In some scenarios (e.g. MetaSwitch interop) the `display` field of callee-id should be left empty instead of being overwritten with the number.
As is done in other places, we allow for `_undef_` to mean "leave the field empty".

Merge pull request #1470 in FS/freeswitch from ~MOCHOUINARD/freeswitch:bugfix/FS-10496-speedup-javascript-enabling-code to master

* commit '3d9365ed':
  FS-10496: [mod_v8] Fixing regression from FS-10496 when no settings exist in v8.conf.

This reverts commit bb4499ec.

This commit breaks the build.  Please correct and re-submit

FS-10521 FS-10612 [mod_callcenter] Member exit reason set to EXIT_WITH_KEY when it should be TIMEOUT and only set EXIT_WITH_KEY if the key pressed is set at cc_exit_keys

Merge pull request #1371 in FS/freeswitch from ~ANDYWOLK/freeswitch:feature/FS-10611-add-domain_data-command-to-retrieve to master

* commit '233481c3':
  FS-10611: [mod_commands] Add domain_data command to retrieve domain information

Merge pull request #1334 in FS/freeswitch from ~ANDYWOLK/freeswitch:feature/FS-10496-speedup-javascript-enabling-code to master

* commit 'c1280938':
  FS-10496: [mod_v8] Speedup JavaScript. Enabling Code Caching.

* commit '6cc029b5':
  FS-10875: #resolve Portability issues for non-bash interpreters.

Merge pull request #1466 in FS/freeswitch from ~ANDYWOLK/freeswitch:bugfix/FS-10876-windows-compile-errors-in-msvc-2017 to master

* commit 'e380b41a':
  FS-10876: [Build-System] Fix build in Visual Studio 2017 and Windows SDK 10.

* commit 'bb4499ec':
  FS-10820 [mod_kazoo] eventstream configuration

Ethernet packets.

FS-10858 - [verto_communicator] Removing emit of res_check_done, on slow connections the emit could happen before the listening thus freezing the app on loading

FS-10858 - [verto_communicator] Waiting for resolution check finish before redirecting to preview screen.

Merge pull request #1456 in FS/freeswitch from ~PRAVEEN_KUMAR/freeswitch:bugfix/FS-10833-mod_amqp-memory-leak-on-reconnection to master

* commit 'd311a06a':
  FS-10833: [mod_amqp] memory leak on reconnection attempt to RabbitMQ broker

Memory leak happening during reconnection attempt after connectivity loss with
RabbitMQ broker.

With these changes, memory leak issue has been addressed and the object has
been properly freed.

Merge pull request #1452 in FS/freeswitch from ~ANDYWOLK/freeswitch:bugfix/FS-10789-v8-segs-on-invalid-instruction to master

* commit 'db3e6ec3':
  FS-10789: [mod_v8] v8 segs on invalid instruction

Merge pull request #1445 in FS/freeswitch from ~PRAVEEN_KUMAR/freeswitch:bugfix/FS-10805-memory-leak-in-mod_amqp to master

* commit '97d6bee3':
  FS-10805: Memory Leak fix in mod_amqp

Memory allocated to hash iterators and hash tables isn't released
during module shutdown.

With these changes, memory allocated to hash iterators and hash tables
will be freed properly.

FS-10622: [core] Auto-fixing audio codec from G722 to PCMU although PCMU was not negotiated #resolve

Merge pull request #1434 in FS/freeswitch from ~PRAVEEN_KUMAR/freeswitch:bugfix/FS-10728-mod_avmd-backward-compatibility_issue to master

* commit '179a659b':
  FS-10728: [mod_avmd] backward compatibility issue in avmd_main_api

This reverts commit 5658e581.

FS-10772 - [mod_callcenter] commit 404c6969 added an invalid WHERE syntax, fixed.