[PATCH-3-5][PATCH-3-5-5] rhbz#678440: Always include User-Agent to avoid 403 from picky servers

[Stephan Bergmann]

It would be nice if 
<http://cgit.freedesktop.org/libreoffice/core/commit/?id=4d0e3127ed2def7212bc05aa860cd06704bb1efe> 
"rhbz#678440: Always include User-Agent to avoid 403 from picky servers" 
fixing <https://bugzilla.redhat.com/show_bug.cgi?id=678440> "opening 
urls fails with error 403 on picky servers" could be reviewed for 
inclusion into libreoffice-3-5 and libreoffice-3-5-5.  I consider the 
patch low-risk.

As the patch would not apply as-is to the 3.5 code line, find attached 
an adapted 0001-rhbz-678440-Always-include-User-Agent-to-avoid-403-f.patch.

Thanks,
Stephan