on debian 7, ws_raw_read returns 0 when client side disconnect the socket,
no HUP is detected and it resulted in an infinite loop.

FS-7191 #resolve #comment edit pgsql example connection string to remove unneeded option that may cause a failure on some systems.

* commit '01dcb74f':
  FS-7187 add switch_cache_db_create_schema() to test for SCF_AUTO_SCHEMAS flag

FS-7174: #resolve #comment make sure not to leave any sessions readlocked in bridge_early_media=true in case one in the middle of the list is abandoned

FS-7180: when using system lua, properly link against renamed library versions on debian for esl luamod

FS-7180: when using system lua, properly link against reanmed library versions on debian for mod_lua

FS-7180: add --enable-sytem-lua configure arg to allow building mod_lua against system lua and allow mod_lua to build against lua 5.1 or 5.2

FS-7180: add --enable-sytem-lua configure arg to allow building mod_lua against system lua and allow mod_lua to build against lua 5.1 or 5.2

* commit '5c5b9fcd':
  If available, use libjpeg-turbo in Debian build dependencies

Debian is transitioning to libjepg-turbo in Jessie.

See the libjpeg-turbo transition plan for details:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=754988

FS-7151 #resolve

* commit '378d3505':
  FS-7004 mod_sndfile: use correct permissions to create new files

libsndfile's sf_open() function doesn't allow to pass file permissions. To fix
this, new files are created with the correct mode before passing them to
libsndfile.

FS-7150 #resolve #comment [mod_rayo] added param add-variables-to-events which will add channel variables to <offer>, <ringing>, <answered>, and <end> if set to true.  Default is false.