Zero-pad usec format to handle values less than 100,000 correctly

ok matthew@ tedu@
SSLv3_client_method() doesn't support TLSv1.*; use SSLv23_client_method()
the for anything where version negotiation would be useful.
Also, constipate a couple formatting strings to make compilers and
linkers happier.

ok tedu@
whack the ifdef pinata:
OPENSSL_SYSNAME_VXWORKS
OPENSSL_SYS_VMS
OPENSSL_SYS_MSDOS
OPENSSL_UNISTD
OPENSSL_SYS_WIN16
WIN_CONSOLE_BUG
OPENSSL_SYS_WINCE
SGTTY
OPENSSL_SYS_MACINTOSH_CLASSIC
MAC_OS_GUSI_SOURCE
OPENSSL_SYS_NETWARE
OPENSSL_SYS_SUNOS
__DJGPP__
OPENSSL_SYS_BEOS
OPENSSL_SYS_WIN32
Thanks to the knobs in http://tools.ietf.org/html/rfc5746, we have a knob
to say "allow this connection to negotiate insecurely". de-fang the code
that respects this option to ignore it.
ok miod@
fix a few bugs observed on http://www.viva64.com/en/b/0250/
ok krw miod
delete a few leftovers