SSL: Follow up work to commits 6a1363128f1107 and 87861c9b0e8155

Changed the failure code when TLS v1.1 and v1.2 is requested but not
supported by older OpenSSL versions, following review from libcurl
peers, and reduced the number of required preprocessor if statements.
curl_sasl: initialize NSS before using crypto
email: Fixed QUIT / LOGOUT being sent when SSL connect fails
RELEASE-NOTES: Synced with ce61510127ea60
tests: Added POP3 RSET test
ftpserver.pl: Added support for APOP POP3 authentication
tests: Added POP3 APOP authentication test
tests: Added POP3 plain authentication test
tests: Added POP3 login authentication test
tests: Added POP3 CRAM-MD5 authentication test
tests: Added POP3 NTLM authentication test
ftpserver.pl: Fixed processing of POP3 authentication strings

...and corrected response when check fails from 500 to -ERR.
test866: Fixed user response from commit 7f7fbe7fbdb449
ftpserver.pl: Fixed syntax error from commit 5b31b38c27bb7a
cmake: unbreak for non-Windows platforms

Patch-by: Oliver Kuckertz
Bug: http://curl.haxx.se/bug/view.cgi?id=1292