MFH (r280630): remove all traces of SSLv2 support

MFH (r280630): remove all traces of SSLv2 support
MFH (r285141): remove unused variable
MFH (r288217): correctly check return value from getaddrinfo(3)
MFH (r289419): fix bugs in HTTPS tunnelling
MFH (r289420): use fopen()'s "e" mode instead of fcntl for close-on-exec
MFH (r291453, r291461): use .netrc for http servers and proxies
MFH (r292330, r292332): reset bufpos to 0 after refilling in chunked mode

PR:		194483 199801 193740 204771

git-svn-id: svn://svn.freebsd.org/base/stable/10@294194 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f