Instead of searching for bridge_id provided in an argument this function
always searched for BRIDGE_ALL first.  Rewrite this function to work
like the similar functions for channel and endpoint functions.

Change-Id: Ib5caca69e11727c5c8a7284a1d00621f40f1e60a

Some (normally optional) modules created notices, warnings, and even errors
in normal situations like (un)load. This cluttered the command-line interface
(CLI) on start and while stopping gracefully. However, when an user went for
the script './contrib/scripts/install_prereq', those modules get compiled-in
because their prerequisites were met at compile time. Furthermore, because of
ASTERISK_27475, the former talkative module 'res_curl' is built as side-effect.

ASTERISK-27553

Change-Id: I9f105f46d72553994e820679bfde3478a551b281

clang 5.0 warned about this.

ASTERISK-27557

Change-Id: I7cceaa88e147cbdf81a3a7beec5c1c20210fa41e

Found as a result of the function being passed an uninitalized variable by
clang.

ASTERISK-27550

Change-Id: I8af3bd84656b685a956d498459f8db3613f68954

gcc 7.2 warned about this.

ASTERISK-27559

Change-Id: I48960dda9cf0a11b6a9426f775e632363f8caa74

The current configure script requires that tool when libpt-dev is installed.
libpt-dev was installed by libopenh323-dev, bacause you wanted to go for H.323
based channel drivers.

ASTERISK-25329

Change-Id: I9c6ab78b7246c21536e1d252dcbffe682f63f83d

ASTERISK-27552

Change-Id: Ifbf9d51e7374ca2e8b27ec568f6770050fc1a854

ASTERISK-27551

Change-Id: I39ff66031e3373e895e2bc47b23a5e860ea4e012

ASTERISK-26046

Change-Id: I48f05698c235f709225b92bec5aa260fb57d69d1

pbx_extension_helper has a check for q->swo.exec == NULL but it doesn't
actually return so we would still run the function.  Fix the return.
Move the 'int res' variable into the only scope which uses it.

Also fix a copy-paste error in ast_pbx_init which could result in a
crash on allocation failure (we exit with a normal error instead).

Change-Id: I0693af921fdc7f56b6a72a21fb816ed08b960a69

Translators are run during module load before the module is actually
running, so it cannot use ast_module_running_ref.

ASTERISK-20346

Change-Id: Iaa0e75da99c696e38000f1a41e340abbd7a88f56

Change-Id: I380c31a255e060309f4916da11176e0d00813215

Change-Id: I872060a30543776a176a316309602d924a23eb29

Change-Id: Id505167cf0f9414a3c144fa2c1e181a2cf288694

Change-Id: I828329ecbd252ae8f27a369a046d2b03102b07c6

This function returns NULL if the module in question is not running.  I
did not change ast_module_ref as most callers do not check the result
and they always call ast_module_unref.

Make use of this function when running registered items from:
* app_stack API's
* bridge technologies
* CLI commands
* File formats
* Manager Actions
* RTP engines
* Sorcery Wizards
* Timing Interfaces
* Translators
* AGI Commands
* Fax Technologies

ASTERISK-20346 #close

Change-Id: Ia16fd28e188b2fc0b9d18b8a5d9cacc31df73fcc

The pjsip_msg_find_hdr function can return NULL. This patch adds a check
when searching for the sequence header to make sure a NULL pointer is never
de-referenced.

Change-Id: I19af23aeeded65be016be92360e8cb7ffe51fad2