Log Message:
Update squid to 2.6.16 (2.6.STABLE16).

Changes to squid-2.6.STABLE16 (5 Sep 2007)

	- Test for sys/capability.h linux include file to avoid failing on
	  linux systems missing libcap
	- Release private objects on cache rebuild
	- Segfault in clientBuildReplyHeader when http->entry == NULL
	- Bug #2072: digest_pw_auth fails when using plaintext passwords
	- Bug #2073: assertion failed: client_side.c:4175: "buf != NULL ||
	  !conn->body.request on POST
	- Adjust default pconn timeouts to avoid shutting down connection while
	  child sends request
	- Bug #1980: cache_peer monitortimeout not working
	- Bug #1882: Parent responses are not cached if sibling returns 504
	- More squid.conf reordering to get the dependencies between options
	  sorted proper

Changes to squid-2.6.STABLE15 (31 Aug 2007)

	- The select() I/O loop got broken by the /dev/poll addition
	  (2.6.STABLE14)
	- Bug #2017: Fails to work around broken servers sending just the HTTP
	  headers
	- Bug #2023: Compile error with old GCC 2.x or other ANSI-C compilers
	  before C99
	- squid.conf.default updated and reorganised in more sensible groups
	- correct and document the syslog access_log format
	- Armenian error pages translation
	- digest_ldap_helper usage help updated
	- Bug #1560: ftpSendPasv: getsockname(-1,..): (9) Bad file descriptor
	- Improve delay pools in low traffic environment by checking timeouts
	  at a steady 1 second interval even when there is not much activity
	- Don't request authentication on transparently intercepted
	  connections
	- Cleanup linux capabilities for tproxy
	- Bug #2003: 'via' config directive doesn't affect response headers
	- Bug #1902: Adds Numeric Hit and invalid request counters to IP Cache
	- Add missing $|=1 to squid_db_auth
	- Bug #2050: Persistent connection dropped if cache has no
	  Content-Length
	- Verify the URL on memory cache hits
	- Bug #2057: NTLM stop work in messengers after upgrade to 2.6.STABLE14
	- Bug #1972: Squid sets peers to down state when they are in fact
	  working.
	- potential segmentation fault in storeLocateVary()
	- Bug #2066: chdir after chroot
	- Windows port: Fix compiler warnings when building Squid as
	  application (not Windows service mode)
	- Spelling correction of received