When the protocol part fails, the data usually does too but the protocol
part is often more fundamental and often provide the clues you need to
fix the test case.

Extended the regex to include other valid characters such as those used
in the reply text of Test 836.

As the email protocols implement SASL authentication rather than IMAP,
POP3 and SMTP specific authentication, updated the authentication
keywords to reflect this.

In the initializer for len, there is no prototype for "strlen".
In this statement, there is no prototype for "memcpy".

Added support for falling back to <data> when <data1>, <data2>, etc...
don't exist in the <reply> section of a unit test.

Specifying user credentials when the SMTP server doesn't support
authentication would cause curl to display "No known authentication
mechanisms supported!" and return CURLE_LOGIN_DENIED.

Reported-by: Tom Sparrow
Bug: http://curl.haxx.se/mail/lib-2014-03/0173.html

The test is only valid when one of four SSL backends is in use,
and must otherwise return success.

The improved connection reuse logic would otherwise create a new
connection for each one, which isn't supported by the test
server, nor expected by the test.

This allows configure --disable-manual to run and build without having
to regenerate the src/tool_hugehelp.c file which otherwise is necessary
since we ship tarballs with that file present.

Reported-by: Remi Gacogne
Bug: http://curl.haxx.se/bug/view.cgi?id=1350

Reported-by: Richard Moore

There are server certificates used with IP address in the CN field, but
we MUST not allow wild cart certs for hostnames given as IP addresses
only. Therefore we must make Curl_cert_hostcheck() fail such attempts.

Bug: http://curl.haxx.se/docs/adv_20140326B.html
Reported-by: Richard Moore

In addition to FTP, other connection based protocols such as IMAP, POP3,
SMTP, SCP, SFTP and LDAP require a new connection when different log-in
credentials are specified. Fixed the detection logic to include these
other protocols.

Bug: http://curl.haxx.se/docs/adv_20140326A.html

For example when a URL is not specified or the headers file fails to
open.

The debug messages printed inside PolarSSL always seems to end with a
newline. So 'infof()' should not add one. Besides the trace 'line'
should be 'const'.