ftpserver.pl: Fixed 'Use of uninitialized value $args in string ne'
ftpserver.pl: Added support for POP3 NOOP command
tests: Added test for POP3 NOOP command
tests: Updated descriptions to be more meaningful
curl_easy_pause: suggest one way to unpause
ftpserver.pl: Corrected POP3 LIST as message numbers should be contiguous

The message numbers given in the LIST response are an index into the
list, which are only valid for the current session, rather than being a
unique message identifier. An index would only be missing from the LIST
response if a DELE command had been issued within the same session and
had not been committed by the end of session QUIT command. Once
committed the POP3 server will regenerate the message numbers in the
next session to be contiguous again. As such our LIST response should
list message numbers contiguously until we support a DELE command in the
same session.

Should a POP3 user require the unique message ID for any or all
messages then they should use the extended UIDL command. This command
will be supported by the test ftpserver in an upcoming commit.
ftpserver: Reworked CAPA support to allow for specifying the capabilities

Renamed SUPPORTCAPA to CAPA and added support for specifying a list of
supported capabilities to return to the client.

Additionally added the directive to the FILEFORMAT document.
ftpserver: Reworked AUTH support to allow for specifying the mechanisms

Renamed SUPPORTAUTH to AUTH and added support for specifying a list of
supported SASL mechanisms to return to the client.

Additionally added the directive to the FILEFORMAT document.
ftpserver.pl: Fixed empty array checks

...from commits 28427b408326a1 and e8313697b6554b.
imap: Fixed calculation of transfer when partial FETCH received

The transfer size would be calculated incorrectly if the email contained
within the FETCH response, had been partially received by the pingpong
layer. As such the following, example output, would be seen if the
amount remaining was smaller than the amount received:

* Excess found in a non pipelined read: excess = 1394, size = 262,
  maxdownload = 262, bytecount = 1374
* transfer closed with -1112 bytes remaining to read

Bug: http://curl.haxx.se/mail/lib-2013-08/0170.html
Reported-by: John Dunn
pingpong: Check SSL library buffers for already read data

Otherwise the connection can get stuck during various phases, waiting
for new data on the socket using select() etc., but it will never be
received as the data has already been read into SSL library.
ldap: fix the build for systems with ldap_url_parse()

Make sure that the custom struct fields are only used by code that
doesn't use a struct defintion from the outside.

Attempts to fix the problem introduced in 3dc6fc42bfc61b
url: handle abortion by read/write callbacks, too

Otherwise, the FTP protocol would unnecessarily hang 60 seconds if
aborted in the CURLOPT_HEADERFUNCTION callback.

Reported by: Tomas Mlcoch
Bug: https://bugzilla.redhat.com/1005686
http2: adjust to new nghttp2_pack_settings_payload proto

This function was modified in nghttp2 git commit a1c3f89c72e51
ftpserver.pl: Added support for POP3 UIDL command
tests: Added test for POP3 UIDL command
ftpserver.pl: Added support for POP3 TOP command
tests: Added test for POP3 TOP command
README.http2: explain nghttp2 a little
RELEASE-NOTES: synced with 25c68903756d6b