Changes in 7.20.0 - February 9 2010

Changes:

• support SSL_FILETYPE_ENGINE for client certificate
• curl-config can now show the arguments used when building curl
• non-blocking TFTP
• send Expect: 100-continue for POSTs with unknown sizes
• added support for IMAP(S), POP3(S), SMTP(S) and RTSP
• added new curl_easy_setopt() options for SMTP and RTSP
• added --mail-from and --mail-rcpt for SMTP
• VMS build system enhancements
• added support for the PRET ftp command
• curl supports --ssl and --ssl-reqd
• added -J/--remote-header-name for using server-provided filename with -O
• enhanced asynchronous DNS lookups
• symbol CURL_FORMAT_OFF_T is obsoleted

Bugfixes:

• progress meter percentage and transfer time estimates fixes
• portability enhancement for OS's without orthogonal directory tree structure
• progress meter/callback during FTP connection
• DNS cache timeout while transfer in progress
• compilation when configured --with-gssapi having GNU GSS installed
• SSL connection reused with mismatched protection level
• configure --with-nss is set but not "yes"
• don't store LDFLAGS in pkg-config file
• never-pruned DNS cached entries
• HTTP proxy tunnel re-used connection even if tunnel got disabled
• SSL lib post-close write
• curl failed to report write errors for tiny failed downloads
• TFTP BLKSIZE
• Expect: 100-continue handling when set by the application
• multi interface with OpenSSL read already freed memory when closing down
• --retry didn't do right for FTP transient errors
• some *_proxy environment variables didn't function
• libcurl-OpenSSL engine cleanup
• header include fix for FreeBSD versions before v8
• fragment part of URLs are no longer sent to the server
• progress callback called repeatedly with c-ares for resolving
• OpenSSL session id ref count leak
• progress callback called repeatedly during slow connects
• curl_multi_fdset() would return -1 too often during SCP/SFTP transfers
• FTP file size checks with ASCII transfers
• HTTP Cookie: headers sort cookies based on specified path lengths
• CURLM_CALL_MULTI_PERFORM fix for multi socket timeout calls
• libcurl data callback excessive length

Further