DOCS: Added information about login options in the URL
DOCS: Added information about login options to CURLOPT_USERPWD
getinfo.c: reset timecond when clearing session-info variables

Bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=705783
Reported-by: Ludovico Cavedon <cavedon@debian.org>
tests: add test1511 to check timecond clean-up

Verifies the timecond fix in commit c49ed0b6c0f
HISTORY: correct some years/dates

Thanks to archive.org's wayback machine I updated this document with
some facts from the early httpget/urlget web page:

http://web.archive.org/web/19980216125115/http://www.inf.ufrgs.br/~sagula/urlget.html
Merge branch 'master' of git://github.com/bagder/curl into sam/sftp-error-return