support 'languageprefix' in asterisk.conf to modify the algorithm

to build pathnames for language-specific files (see file.c for
a description)

Default, of course, to the standard behaviour.

We don't have an asterisk.conf.sample to put an example of use!



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@21451 65c4cc65-6c06-0410-ace0-fbb531ad65f3