mod_voicemail_ivr: Document example settings parameters.  This is open for discussion before being implemented

mod_voicemail_ivr:  BETA : An alternative voicemail IVR system.  It require an API provider for voicemail access that is currently provided by mod_voicemail vm_fsdb API so it can be used simultaneously with mod_voicemail IVR.  It currently try to resemble the normal FreeSwitch Voicemail experience.  The goal is to expand upon that experience without affecting everyone inproduction user experience.

This fix a out of bound memory write.
(normally unreachable with a real phone)

  cc1: warnings being treated as errors
  libs/esl/src/esl.c: In function "esl_recv_event":
  libs/esl/src/esl.c:1190: error: array subscript is above array bounds
  libs/esl/src/esl.c:1227: error: array subscript is above array bounds

Clamp handle_recv() return value to safe values.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

I think this will be fine for the moment.  Thanks

This look to be the same parsing done in lcr_app_function.  So I would think it an expected behavior and it good to have it at both place.

Warning to nibblebill user.  This patch will change how billing amount is charged by using the previously unused nibble_inrement variable.  If you don't want to increase by increment, then just don't have the increment set

I've changed it to use TAG_IF instead

FS-3071 I've finally merged it all.  It all look good, shouldn't affect anyone who didn't set those value