multimedia/realplayer: Enabled mozilla plugin
multimedia/realplayer: Enabled mozilla plugin

This commit also includes better error/version checking for
cases where upstream bumps the version without renaming the
'source' tarball.  No idea how often that occurs, but based
on the previous script, it's happened at least once...  :)

Signed-off-by: Robby Workman <2f5326e16de92cfeea9ded47a50f5e7144bd5a01@slackbuilds.org>

panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds