switch_core_file: Fix a regression from earlier commit on some distro forcing warning on 'forced' return function value

sofia-lib: More Fix for -Wunused-but-set-variable required compiler. (Might need to be ported back to sofia)

mod_callcenter: Decided to take the easy way for portability for the moment.  We expect time_t to be an integral anyway in the core, so I'll expect the same here.  Should fix the problem with the partial change I did on i386 system

autoconf: Comment out the forced -Wunused-but-set-variable since not all module could be tested.  List of module I couldn't compile is in the comment.  Please all the different module maintainer check your module for this.  Thanks

Fix for -Wunused-but-set-variable required compiler. : mod_freetdm mod_avmd mod_cidlookup mod_ladspa mod_lcr mod_nibblebill mod_rss mod_vdm mod_dahdi_codec mod_skinny mod_cdr_pg_csv

sofia-lib: Fix for -Wunused-but-set-variable required compiler. (Might need to be ported back to sofia)

autoconf: Added the -Wunused-but-set-variable to the default compile to help avoid commiting more unused variable but set value.  Please report if you do have problem with it.

mod_callcenter: Quick changes to try to make it more multi platform friendly.  Still need to find the best way to convert a string to time_t that is multi platform.

mod_callcenter: Changes lot of log file to include the uuid of the member.  Also added a bunch of debug log entry to help debug an issue

switch_ivr/xml: Change the structure of the phrases/language system. Previously it was fxml->phrases->macros->language->macro.  Changed it so fxml->languages->language->phrases->macros->macro
You can have sub macros <macros name="voicemail"><macro ...> and allow you to call it login@voicemail.
Change the sound-path to sound-prefix to make it constistant with the rest of freeswitch.
Also allow to set a sound-prefix to a macros, so you can override it for a specific file set.
You can set say-modules="en" or whatever in the <language section to define that say module to use.