Change-Id: Ic98a51f555062cd863b6db3f8d76065943a9dea3

* Extracted sip_endpoint_identifier_type2str() and
sip_endpoint_identifier_str2type() to simplify the calling functions.

* Fixed pjsip_configuration.c:ident_to_str() building the endpoint's
identify_by value string.

Change-Id: Ide876768a8d5d828b12052e2a75008b0563fc509

The AMI PJSIPShowEndpoint action could only list one IdentifyDetail AMI
event per endpoint.  However, there is no reason that multiple
type=identify sections cannot identify the same endpoint.

* Reworked format_ami_endpoint_identify() to generate as many
IdentifyDetail AMI events as there are matching identifiers.

Change-Id: Ie146792aef72d78e05416ab5b27bc552a30399db

ast_format_get_sample_rate(.) returns an unsigned type. The difference of a
substraction between two unsigned types does not get implicitly converted to a
signed type. Therefore, using abs(.) did not make sense.

ASTERISK-27549

Change-Id: Ib904d9ee0d46b6fdd1476fbc464fbbf813304017

This reverts commit 028f4320.

Change-Id: Ieb91f825cb55202a937f5361c01d356e7662b70c

Some WebRTC clients can't handle renegotiation with the addition of
streams that include an offer to bundle. They instead expect the
newly added streams to already be bundled. This change does such a thing
if WebRTC support is enabled on an endpoint.

ASTERISK-27566

Change-Id: I7fe9b7ac35a2798627d9c2c8369129f407af6461

* validate_stream: zero result from ast_format_cap_identical indicates
  they are not identical, rather than non-zero indicating an error.
* validate_original_streams: use num_streams instead of
  ARRAY_LEN(params).
* Fix declaration of alice_dest_stream and bob_dest_stream.

Change-Id: I6b1dd8bed10439d3c7406f033eb1896b6c419147

The check for last_user == NULL needs to happen before we dereference
the variable, previously it was possible for us to check flags of a NULL
last_user.

Change-Id: I274f737aa8af9d2d53e4a78cdd7ad57561003945

In addition to being a micro-optimization (RAII_VAR has overhead), this
change improves output of REF_DEBUG.  Unfortunately when RAII_VAR calls
ao2_cleanup it does so from a generated _dtor_varname function.  For
example this caused _dtor_app to release a reference instead of
__stasis_app_unregister.

Change-Id: I4ce67120583a446babf9adeec678b71d37fcd9e5

Add an AMI action which provides information on all
configured Auths.

ASTERISK-27547

Change-Id: I1a88a75b38a2b1dd9d1de6c0307b20a3f584c817

If the dial bridge has been created it must be released by calling
ast_bridge_destroy, simply releasing the ao2 reference is not enough.

Also move stasis_app_control_shutdown earlier in unload to ensure the
bridge cannot be created or grabbed after the app_bridges container is
released.

Change-Id: I372302de94ca63876069e2585a049c5060e5e767

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

When an older GCC version is called with a too new warning option, GCC exited
with an error and Asterisk was not built. Therefore, the configure script tests
the installed compiler whether it supports that warning option. If not, Asterisk
does not pass it to the installed compiler. However, some compilers (like clang)
do not exit (error) but give just a warning in such a case. Because the compiler
did not exit, Asterisk passed the unknown-warning option.

ASTERISK-27560

Change-Id: Ia9b7747f649b27ff5e9f75c3db3fee4fe7a29621

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