Log Message:
Update to 1.4.58. From the changelog:

- [tests] collect code for "die-at-end" tests
- [tests] remove FastCGI test dependency on libfcgi
- [core] prefer IPv6+IPv4 func vs IPv4-specific func
- [tests] remove FastCGI test dependency on PHP
- [core] reuse large mem chunks (fix mem usage) (fixes #3033)
- [core] add comment for FastCGI mem use in hctx→rb (#3033)
- [mod_proxy] fix sending of initial reqbody chunked
- [multiple] fdevent_waitpid() wrapper
- [core] sys-time.h – localtime_r,gmtime_r macros
- [core] http_date.[ch] encapsulate HTTP-date parse
- [core] specialized strptime() for HTTP date fmts
- [multiple] employ http_date.h, sys-time.h
- [core] http_date_timegm() (portable timegm())
- buffer_append_path_len() to join paths
- [core] inet_ntop_cache -> sock_addr_cache
- [tests] slight speed up checking for server ready
- [tests] load required modules in alt .conf tests
- [multiple] etag.[ch] -> http_etag.[ch]; better imp
- [core] fix crash after specific err in config file
- [core] fix bug in FastCGI uploads (#3033)
- [tests] OpenBSD crypt() support limited to bcrypt
- [core] http_response_match_if_range()
- [mod_webdav] typedef off_t loff_t for FreeBSD
- [multiple] chunkqueue_write_chunk()
- [build] add GNUMAKEFLAGS=—no-print-directory
- [tests] consolidate some tests/ content
- [core] fix bug in read retry found by coverity

Updating during the freeze for (also from the changelog) "important
changes: bugfixes, portability".