Curl and libcurl 7.20.0

 Public curl releases:         114
 Command line options:         134
 curl_easy_setopt() options:   165
 Public functions in libcurl:  58
 Known libcurl bindings:       39
 Contributors:                 761

This release includes the following changes:

 o support SSL_FILETYPE_ENGINE for client certificate
 o curl-config can now show the arguments used when building curl
 o non-blocking TFTP
 o send Expect: 100-continue for POSTs with unknown sizes
 o added support for IMAP, POP3 and SMTP transfers
 o added --mail-from and --mail-rcpt for SMTP

This release includes the following bugfixes:

 o progress meter percentage and transfer time estimates fixes
 o portability enhancement for OS's without orthogonal directory tree structure
 o progress meter/callback during FTP connection
 o DNS cache timeout while transfer in progress
 o compilation when configured --with-gssapi having GNU GSS installed
 o SSL connection reused with mismatched protection level
 o configure --with-nss is set but not "yes"
 o don't store LDFLAGS in pkg-config file
 o never-pruned DNS cached entries
 o HTTP proxy tunnel re-used connection even if tunnel got disabled
 o SSL lib post-close write
 o curl failed to report write errors for tiny failed downloads
 o TFTP BLKSIZE
 o Expect: 100-continue handling when set by the application
 o multi interface with OpenSSL read already freed memory when closing down
 o --retry didn't do right for FTP transient errors
 o some *_proxy environment variables didn't function
 o libcurl-OpenSSL engine cleanup
 o header include fix for FreeBSD versions before v8

This release includes the following known bugs:

 o see docs/KNOWN_BUGS (http://curl.haxx.se/docs/knownbugs.html)

This release would not have looked like this without help, code, reports and
advice from friends like these:

 Yang Tse, Kamil Dudka, Christian Schmitz, Constantine Sapuntzakis,
 Marco Maggi, Camille Moncelier, Claes Jakobsson, Kevin Baughman,
 Marc Kleine-Budde, Jad Chamcham, Bjorn Augustsson, David Byron,
 Markus Koetter, Chad Monroe, Martin Storsjo, Siegfried Gyuricsko,
 Jon Nelson, Julien Chaffraix, Renato Botelho, Peter Pentchev

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