I've audited all modules that include any header which includes
asterisk/optional_api.h.  All modules which use OPTIONAL_API now declare
those dependencies in AST_MODULE_INFO using requires or optional_modules
as appropriate.

In addition ARI dependency declarations have been reworked.  Instead of
declaring additional required modules in res/ari/resource_*.c we now add
them to an optional array "requiresModules" in api-docs for each module.
This allows the AST_MODULE_INFO dependencies to include those missing
modules.

Change-Id: Ia0c70571f5566784f63605e78e1ceccb4f79c606

ASTERISK-27602

Change-Id: I9f4d3d2bc1481748e39ad1e2b0a364d38e38978b

Change-Id: Ic44d75141b9bf99e7d72fcc82ee111b5cf6989d2

ASTERISK-27600
Reported by: Hamid R. Hashmi

Change-Id: I683d14d024650be04074b037b6300464519409f4

Each time the dial plan is reloaded, a lot of logs like these are generated:
"Added extension 'XXXXX' priority 1 to YYYYYYYYYYY"
This patch changes the log level for those logs.

ASTERISK-27084

Change-Id: I5662902161c50890997ddc56835d4cafb456c529

Change-Id: I67ed9039bf3f132fb20ee7a750e0aef0f704d7d3

Dependency loader is now in place so we no longer need a separate loader
phase for global symbols only.  This simplifies the loader and allows us
to minimize calls to dlopen.

Change-Id: I33e3174d67f3b4552d3d536326dcaf0ebabb097d

* Add string vectors for requires, optional_apis and enhances.
* Add reffed_deps module vector for holding references to dependencies.
* Initialize string vectors after final dlopen of each module.
* Free string vectors and clear references from reffed_deps in
  module_destroy.
* Create functions necessary to process module dependencies and enforce
  load order.

Module dependencies result in automatic references being managed by the
module loader.  This enforces unload order.

Change-Id: I9be08d1dd331aceadc1dcba00b804d71360b2fbb

This patch adds the ability to configure a prompt which will be read
to the "winner" who pressed 1 (or the configured value) and received
the call.

ASTERISK-24372 #close

Change-Id: I6ec1c6c883347f7d1e1f597189544993c8d65272

* Remove comment about lazy load.
* Improve message about module already being loaded and running.
* Handle allocation error in add_to_load_order.
* Dead code elimination from modules_shutdown.

Change-Id: I22261599c46d0f416e568910ec9502f45143197f

Affacted the (automatic) download script for external modules:
./build_tools/download_externals

ASTERISK-27596

Change-Id: If4c3176f7bf58df32fec6e02a659f1a78d57cf4b

ASTERISK-27594

Change-Id: Iaaa6a19d2fe031dffcba441d0502a7ea65c93cb3

ASTERISK-27593

Change-Id: I1c7087f7f7582e40b3312c690d912c9a86466805

On some platforms, you decide to go for one specific version of Lua, for
example in OpenBSD. On other platforms, you are able to install several versions
side-by-side, for example in Ubuntu and Fedora. Asterisk already works with
Lua 5.3. Asterisk failed to detect Lua 5.3 on those platforms which allow
several versions.

ASTERISK-27592

Change-Id: If7a4b395d844a464e9a1f4f626c5bff4ee67eed8

The type=identify endpoint identification method can match by IP address
and by SIP header.  However, the SIP header matching has limited
usefulness because you cannot specify the SIP header matching priority
relative to the IP address matching.  All the matching happens at the same
priority and the order of evaluating the identify sections is
indeterminate.  e.g., If you had two type=identify sections where one
matches by IP address for endpoint alice and the other matches by SIP
header for endpoint bob then you couldn't predict which endpoint is
matched when a request comes in that matches both.

* Extract the SIP header matching criteria into its own "header" endpoint
identification method so the user can specify the relative priority of the
SIP header and the IP address matching criteria in the global
endpoint_identifier_order option.  The "ip" endpoint identification method
now only matches by IP address.

ASTERISK-27491

Change-Id: I9df142a575b7e1e3471b7cda5d3ea156cef08095

Since v12 the number of taskprocessors in the system has increased a lot.
Small systems can easily have over a hundred and larger systems can have
thousands.

Most uses of the tps_singletons container deal with creating and
destroying the taskprocessors.  However, the pjsip distributor looks up
taskprocessors/serializers by name frequently.  It needs to find the
serializer for incoming SIP responses to distribute them to the
appropriate serializer.

Change-Id: Ice0603606614ba49f7c0c316c524735c064e7e43

We still need to figure out how a bad header is getting into the
outgoing message but this patch to pjproject prevents attempting
to print that header and causing a crash.

For several users, this crash happens when sending 183 progress
messages.

ASTERISK-26832
Reported by: Ross Beer, Jan Rozhon

Change-Id: Ie5c5a921c890c843587763e7f33f987dfe66bd16

Makefile included a call to ${EUID} which requires the shell bash. To keep
compatibility with other shells like dash or ksh, use id -u instead.

ASTERISK-27589

Change-Id: Ia6e74f5bc9aab4e6dc62b7439f647b7964e6f657

Asterisk's makefile for menuselect has a very simple source file parsing
script that looks for AST_MODULE_INFO lines to extract the quoted string
as a module description.  If it does not find a quoted string it uses the
whole line as the description.

Change-Id: I80f13a63818e4e28d683639a94a4dfaea405c1d5

* Declare 'requires' and 'enhances' text fields on module info structure.
* Rename 'nonoptreq' to 'optional_modules'.
* Update doxygen comments.

Still need to investigate dependencies among modules I cannot compile.

Change-Id: I3ad9547a0a6442409ff4e352a6d897bef2cc04bf

ast_vector_string_split:
This function will add items to an ast_vector_string by splitting values
of a string buffer.  Items are appended to the vector in the order they
are found.

ast_vector_const_string:
A vector of 'const char *'.

Change-Id: I1bf02a1efeb2baeea11c59c557d39dd1197494d7

ASTERISK-27585

Change-Id: I27c67563788e6f67eeda5fb51a741823a50a95e2