Murray Stokely 7f92799f67 Add support for HTTP 1.1 If-Modified-Since behavior.
fetch(1) accepts a new argument -i <file> that if specified will cause
the file to be downloaded only if it is more recent than the mtime of
<file>.

libfetch(3) accepts the mtime in the url structure and a flag to
indicate when this behavior is desired.

PR:		bin/87841
Submitted by:	Jukka A. Ukkonen <jau@iki.fi> (partially)
Reviewed by:	des, ru
MFC after:	3 weeks
2008-12-15 08:27:44 +00:00
..
2008-05-04 22:24:40 +00:00
2007-06-10 19:06:09 +00:00
2008-11-29 14:32:14 +00:00
2008-05-15 15:28:18 +00:00
2007-04-09 01:45:30 +00:00
2008-08-08 00:21:27 +00:00