curl security, bug fix and enhancement update

7.15.5-9 - http://curl.haxx.se/docs/adv20100209.html 565408 7.15.5-8 - mention lack of IPv6, FTPS and LDAP support while using a socks proxy 473128 - avoid tight loop if an upload connection is broken 479967 - add options --ftp-account and --ftp-alternative-to-user to program help 517084 - fix...