RELEASE-NOTES: Synced with 0ff0a994

This release includes the following changes:

 o imap/pop3/smtp: Added support for SASL authentication downgrades

 o imap/pop3/smtp: Extended the login options to support multiple auth mechanisms

 o TheArtOfHttpScripting: major update, converted layout and more

 o 

This release includes the following bugfixes:

 o curl_easy_setopt: Fixed OAuth 2.0 Bearer option name [1]

 o pop3: Fixed APOP being determined by CAPA response rather than by timestamp

 o Curl_pp_readresp: zero terminate line [2]

 o FILE: don't wait due to CURLOPT_MAX_RECV_SPEED_LARGE [3]

 o docs: mention CURLOPT_MAX_RECV/SEND_SPEED_LARGE don't work for FILE://

 o pop3: Fixed auth preference not being honored when CAPA not supported

 o imap: Fixed auth preference not being honored when CAPABILITY not supported

 o threaded resolver: Use pthread_t * for curl_thread_t [4]

 o 

This release includes the following known bugs:

This release would not have looked like this without help, code, reports and

advice from friends like these:

 Steve Holme, Viktor Szakáts

 Steve Holme, Viktor Szakts, Mohammad AlSaleh, Luke Dashjr

        Thanks! (and sorry if I forgot to mention someone)

References to bug reports and discussions on issues:

 [1] = http://curl.haxx.se/bug/view.cgi?id=1313

 [2] = http://curl.haxx.se/mail/lib-2013-12/0113.html

 [3] = http://curl.haxx.se/bug/view.cgi?id=1312

 [4] = http://curl.haxx.se/bug/view.cgi?id=1314