Log Message:
Update to 7.40.0. Disable gssapi by default on NetBSD, since it doesn't
compile any longer, see
https://sourceforge.net/p/curl/bugs/1469/

Changes:

Curl and libcurl 7.40.0

 Public curl releases:         143
 Command line options:         162
 curl_easy_setopt() options:   208
 Public functions in libcurl:  58
 Contributors:                 1219

This release includes the following changes:

 o http_digest: Added support for Windows SSPI based authentication
 o version info: Added Kerberos V5 to the supported features
 o Makefile: Added VC targets for WinIDN
 o config-win32: Introduce build targets for VS2012+
 o SSL: Add PEM format support for public key pinning
 o smtp: Added support for the conversion of Unix newlines during mail send [8]
 o smb: Added initial support for the SMB/CIFS protocol
 o Added support for HTTP over unix domain sockets, via
   CURLOPT_UNIX_SOCKET_PATH and --unix-socket
 o sasl: Added support for GSS-API based Kerberos V5 authentication

This release includes the following bugfixes:

 o darwinssl: fix session ID keys to only reuse identical sessions [18]
 o url-parsing: reject CRLFs within URLs [19]
 o OS400: Adjust specific support to last release
 o THANKS: Remove duplicate names
 o url.c: Fixed compilation warning
 o ssh: Fixed build on platforms where R_OK is not defined [1]
 o tool_strdup.c: include the tool strdup.h
 o build: Fixed Visual Studio project file generation of strdup.[c|h]
 o curl_easy_setopt.3: add CURLOPT_PINNEDPUBLICKEY [2]
 o curl.1: show zone index use in a URL
 o mk-ca-bundle.vbs: switch to new certdata.txt url
 o Makefile.dist: Added some missing SSPI configurations
 o build: Fixed no NTLM support for email when CURL_DISABLE_HTTP is defined
 o SSH: use the port number as well for known_known checks [3]
 o libssh2: detect features based on version, not configure checks
 o http2: Deal with HTTP/2 data inside Upgrade response header buffer [4]
 o multi: removed Curl_multi_set_easy_connection
 o symbol-scan.pl: do not require autotools
 o cmake: add ENABLE_THREADED_RESOLVER, rename ARES
 o cmake: build libhostname for test suite
 o cmake: fix HAVE_GETHOSTNAME definition
 o tests: fix libhostname visibility
 o tests: fix memleak in server/resolve.c
 o vtls.h: Fixed compiler warning when compiled without SSL
 o CMake: Restore order-dependent header checks
 o CMake: Restore order-dependent library checks
 o tool: Removed krb4 from the supported features
 o http2: Don't send Upgrade headers when we already do HTTP/2
 o examples: Don't call select() to sleep on windows [6]
 o win32: Updated some legacy APIs to use the newer extended versions [5]
 o easy.c: Fixed compilation warning when no verbose string support
 o connect.c: Fixed compilation warning when no verbose string support
 o build: in Makefile.m32 pass -F flag to windres
 o build: in Makefile.m32 add -m32 flag for 32bit
 o multi: when leaving for timeout, close accordingly
 o CMake: Simplify if() conditions on check result variables
 o build: in Makefile.m32 try to detect 64bit target
 o multi: inform about closed sockets before they are closed
 o multi-uv.c: close the file handle after download
 o examples: Wait recommended 100ms when no file descriptors are ready
 o ntlm: Split the SSPI based messaging code from the native messaging code
 o cmake: fix NTLM detection when CURL_DISABLE_HTTP defined
 o cmake: add Kerberos to the supported feature
 o CURLOPT_POSTFIELDS.3: mention the COPYPOSTFIELDS option
 o http: Disable pipelining for HTTP/2 and upgraded connections
 o ntlm: Fixed static'ness of local decode function
 o sasl: Reduced the need for two sets of NTLM messaging functions
 o multi.c: Fixed compilation warnings when no verbose string support
 o select.c: fix compilation for VxWorks [7]
 o multi-single.c: switch to use curl_multi_wait
 o curl_multi_wait.3: clarify numfds being used if not NULL
 o http.c: Fixed compilation warnings from features being disabled
 o NSS: enable the CAPATH option [9]
 o docs: Fix FAILONERROR typos
 o HTTP: don't abort connections with pending Negotiate authentication
 o HTTP: Free (proxy)userpwd for NTLM/Negotiate after sending a request
 o http_perhapsrewind: don't abort CONNECT requests
 o build: updated dependencies in makefiles
 o multi.c: Fixed compilation warning
 o ftp.c: Fixed compilation warnings when proxy support disabled
 o get_url_file_name: Fixed crash on OOM on debug build
 o cookie.c: Refactored cleanup code to simplify
 o OS400: enable NTLM authentication
 o ntlm: Use Windows Crypt API
 o http2: avoid logging neg "failure" if h2 was not requested
 o schannel_recv: return the correct code [10]
 o VC build: added sspi define for winssl-zlib builds
 o Curl_client_write(): chop long data, convert data only once
 o openldap: do not ignore Curl_client_write() return code
 o ldap: check Curl_client_write() return codes
 o parsedate.c: Fixed compilation warning
 o url.c: Fixed compilation warning when USE_NTLM is not defined
 o ntlm_wb_response: fix "statement not reached" [11]
 o telnet: fix "cast increases required alignment of target type"
 o smtp: Fixed dot stuffing when EOL characters at end of input buffers [12]
 o ntlm: Allow NTLM2Session messages when USE_NTRESPONSES manually defined
 o ntlm: Disable NTLM v2 when 64-bit integers are not supported
 o ntlm: Use short integer when decoding 16-bit values
 o ftp.c: Fixed compilation warning when no verbose string support
 o synctime.c: fixed timeserver URLs
 o mk-ca-bundle.pl: restored forced run again
 o ntlm: Fixed return code for bad type-2 Target Info
 o curl_schannel.c: Data may be available before connection shutdown
 o curl_schannel: Improvements to memory re-allocation strategy [13]
 o darwinssl: aprintf() to allocate the session key
 o tool_util.c: Use GetTickCount64 if it is available
 o lib: Fixed multiple code analysis warnings if SAL are available
 o tool_binmode.c: Explicitly ignore the return code of setmode
 o tool_urlglob.c: Silence warning C6293: Ill-defined for-loop
 o opts: Warn CURLOPT_TIMEOUT overrides when set after CURLOPT_TIMEOUT_MS
 o SFTP: work-around servers that return zero size on STAT [14]
 o connect: singleipconnect(): properly try other address families after failure
 o IPV6: address scope != scope id [15]
 o parseurlandfillconn(): fix improper non-numeric scope_id stripping [16]
 o secureserver.pl: make OpenSSL CApath and cert absolute path values
 o secureserver.pl: update Windows detection and fix path conversion
 o secureserver.pl: clean up formatting of config and fix verbose output
 o tests: Added Windows support using Cygwin-based OpenSSH
 o sockfilt.c: use non-Ex functions that are available before WinXP
 o VMS: Updates for 0740-0D1220
 o openssl: warn for SRP set if SSLv3 is used, not for TLS version
 o openssl: make it compile against openssl 1.1.0-DEV master branch
 o openssl: fix SSL/TLS versions in verbose output
 o curl: show size of inhibited data when using -v
 o build: Removed WIN32 definition from the Visual Studio projects
 o build: Removed WIN64 definition from the libcurl Visual Studio projects
 o vtls: Use bool for Curl_ssl_getsessionid() return type
 o sockfilt.c: Replace 100ms sleep with thread throttle
 o sockfilt.c: Reduce the number of individual memory allocations
 o vtls: Don't set cert info count until memory allocation is successful
 o nss: Don't ignore Curl_ssl_init_certinfo() OOM failure
 o nss: Don't ignore Curl_extract_certinfo() OOM failure
 o vtls: Fixed compilation warning and an ignored return code
 o sockfilt.c: Fixed compilation warnings
 o darwinssl: Fixed compilation warning
 o vtls: Use '(void) arg' for unused parameters
 o sepheaders.c: Fixed resource leak on failure
 o lib1900.c: Fixed cppcheck error [17]
 o ldap: Fixed Unicode connection details in Win32 initialsation / bind calls
 o ldap: Fixed Unicode DN, attributes and filter in Win32 search calls