Fix storage class for 'cause' in user_outgoing_channel() so that each call has its very own hangup cause

- allow infinite registrations (expire=0)
- when removing a registration, keep the other with same user if multiple reg is allowed

FS-3054 --comment-only try latest commit, I can guess what probably causes the seg based on my last patch

ESL-56 null terminate buffer after reading from the socket to prevent cross-over to old data that confuses the parser and throws off framing. (regression from 2081bf97)

bump mod_shout to use mpg123-1.13.2 to hopefully address unwanted calls to exit() and inherit other upstream fixes

description parameter (not needed and ends up in output).
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>

Default behaviour is unchanged.

Packagers should use this option to install freetdm.pc into
the system's main pkg-config directory (e.g. /usr/lib/pkgconfig).
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>
Tested-by: Stefan Knoblich <s.knoblich@axsentis.de>

Default behaviour is unchanged.

Packagers should use this option to install freeswitch.pc into
the system's main pkg-config directory (e.g. /usr/lib/pkgconfig).
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>
Tested-by: Stefan Knoblich <s.knoblich@axsentis.de>

This is a autotools (autoconf/automake/libtool) based skeleton framework for developing
external (= out-of-tree) modules for FreeSWITCH.

Variants of this framework have been used to develop modules like mod_openais, mod_ssh and others.

NOTE: This version of the SDK relies on pkg-config to detect FreeSWITCH
      installations.

Other SDKs for external modules should be added in: "src/mod/sdk/<build-system-name>/"
e.g. a scons-based SDK should be put in: "src/mod/sdk/scons/"
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>
Requested-by: Michal Bielicki - cypromis <michal.bielicki@seventhsignal.de>

FS-3078 see wrapper function that should do the same thing this is called at the time when the sdp is created so if it still doesn't work it would suggest that you have this variable set passing in from the other leg in which case you need to set it explicitly because the mode of the inbound leg prevails over the profile default