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

We did this for TCP transports already but I'm not sure why we
didn't do it for TLS transports.

ASTERISK_27474 #not_final_fix

Change-Id: I5b1ef4b882f7b859e718236686b7898751dbb262

If any component of ast_config_AST_RECORDING_DIR is a symbolic link we
would incorrectly assume the ARI user was trying to escape the recording
path.  Create additional check to check the recording directory's
realpath, only deny access if both do not match.

This is needed by the testsuite when run by 'run-local'.

Change-Id: I9145e841865edadcb5f75cead3471ad06bbb56c0

ASTERISK-27575 #close

Change-Id: Ica3a522892afed7a96816a5ecf140e1671f46ad4

clang 5.0 warned about this.

ASTERISK-27576

Change-Id: If41f400a51973c06cdb9b75462e535b616bfe385