openssl: fix a line length warning
nss: drop the code for libcurl-level downgrade to SSLv3

This code was already deactivated by commit
ec783dc142129d3860e542b443caaa78a6172d56.
transfer: drop the code handling the ssl_connect_retry flag

Its last use has been removed by the previous commit.
sasl_sspi: Allow DIGEST-MD5 to use current windows credentials

Fixed the ability to use the current log-in credentials with DIGEST-MD5.
I had previously disabled this functionality in commit 607883f13c as I
couldn't get this to work under Windows 8, however, from testing HTTP
Digest authentication through Windows SSPI and then further testing of
this code I have found it works in Windows 7.

Some further investigation is required to see what the differences are
between Windows 7 and 8, but for now enable this functionality as the
code will return an error when AcquireCredentialsHandle() fails.
sspi: Return CURLE_LOGIN_DENIED on AcquireCredentialsHandle() failure

Return a more appropriate error, rather than CURLE_OUT_OF_MEMORY when
acquiring the credentials handle fails. This is then consistent with
the code prior to commit f7e24683c4 when log-in credentials were empty.
vtls.c: Fixed compilation warning

conversion from 'size_t' to 'unsigned int', possible loss of data
RELEASE-NOTES: Synced with 32913182dc
opts: added some "SEE ALSO" references
configure.ac: remove checks for OpenSSL NPN/ALPN funcs again

... since the conditional in the code are now based on OpenSSL versions
instead to better support non-configure builds.
openssl: enable NPN separately from ALPN

... and allow building with nghttp2 but completely without NPN and ALPN,
as nghttp2 can still be used for plain-text HTTP.

Reported-by: Lucas Pardue
CURLOPT_DIRLISTONLY.3: Added information about the usage in POP3
CURLOPT_CUSTOMREQUEST.3: Fixed incomplete protocol list

Whilst the description included information about SMTP, the protocol
list only showed "TTP, FTP, IMAP, POP3".
CURLOPT_PINNEDPUBLICKEY.3: added details
build: added Watcom support to build with WinSSL.
curl_easy_setopt.3: Moved CURLOPT_DIRLISTONLY into PROTOCOL OPTIONS

...as this option affects more that just FTP.
curl_easy_setopt.3: Fixed lots of typos
code cleanup: Use 'CURLcode result'
CURLOPT_CONNECT_ONLY.3: Fixed incomplete protocol list

Added missing IMAP to the protocol list.
CURLOPT_GSSAPI_DELEGATION.3: Use GSS-API rather than GSSAPI

As implementations are refereed to GSS-API libraries as per the RFC and
GSSAPI typically refers to an authentication mechanism.
CURLOPT_CONNECT_ONLY.3: Removed "This option is implemented for..." text

As this is covered by the PROTOCOLS section and saves having to update
two parts of the document with the same information in future.