Colons in Snapshot Filename

On OS X and Linux, we use colons to format the time code in the snapshot's names. That's not exactly a great idea, especially on Mac OS X with it's Carbon heritage. Better use underscores instead.

Credit to Jeremy (jbutler) on the forum for reporting.

http://forum.videolan.org/viewtopic.php?f=12&t=42048&p=131370#p131370

added Component::Core: Video output Difficulty::easy Severity::critical Type::bug Version::master git labels

changed milestone to %0.9.0-test1

See src/text/strings.c, filename_sanitize() and path_sanitize() for which characters should be forbidden.

(In [24338]) fix #1362 (closed) (replace ':' with '_' in filenames on macosx)

added Status::fixed label

closed