Add support for the Elbrus architecture

[mod_sofia] Fix some incorrect word contractions.

The Elbrus architecture (aka E2K, aka 2000) is LE.
Signed-off-by: Andrew Savchenko <bircoph@altlinux.org>

Updated slack community link to the current (working) join link as old one expired. Closes #29

[mod_av] Fix crash on `av show codecs` and `av show formats`.

[mod_say_fr] Fix "10" not playing in French.

Add initial README.md

Merge pull request #1803 in FS/freeswitch from bugfix/FS-12025-freeswitch-crashes-on-reloadxml-when-spandsp-tone-detection-is-running to master

* commit 'd45e9df8':
  FS-12025: [mod_spandsp] FreeSWITCH crashes on reloadxml when spandsp tone detection is running.

* commit '6704d3aa':
  FS-11917: [mod_event_socket] Added error logging if cannot parse IP address

Merge pull request #1813 in FS/freeswitch from bugfix/FS-12042-sofia-sip-fix-leaks-in-stun-and-a-typo-in-sresolv to master

* commit '583bf044':
  FS-12042: [sofia-sip] Fix typo in sresolv.

Merge pull request #1812 in FS/freeswitch from bugfix/FS-12041-core-fix-memory-leak-on-msrp-shutdown to master

* commit '70831a71':
  FS-12041: [Core] Fix memory leak on msrp shutdown

* commit '20a893fd':
  FS-12038: [mod_sofia, core] Fix potential leak and race in chat_hash, add switch_core_hash_insert_auto_free().

FS-12038: [mod_sofia, core] Fix potential leak and race in chat_hash, add switch_core_hash_insert_auto_free().

Merge pull request #1811 in FS/freeswitch from bugfix/FS-12040-mod_sofia-fix-potential-leak-if-realloc-fails to master

* commit '7ee53a6e':
  FS-12040: [mod_sofia] Fix potential leak if realloc fails.

Merge pull request #1810 in FS/freeswitch from bugfix/FS-12039-core-fix-memory-leak-on-ssl-shutdown to master

* commit 'f00d285b':
  FS-12039: [Core] Fix memory leak on ssl shutdown.

Merge pull request #1244 in FS/freeswitch from ~DRAGOS_OANCEA_NX/freeswitch-dragos-nx:fix/FS-10191/disable_video_floor_event_for_audio to master

* commit '4d4afbeb':
  FS-10191: don't send "video-floor-change" event for audio-only conference

* commit '75978353':
  FS-12022: [mod_event_socket] Add Job-Owner-UUID with session uuid when using bgapi inside outbound socket

Merge pull request #1805 in FS/freeswitch from bugfix/FS-11995-err-mod_fifo.c-4398-odbc-is-not-available to master

* commit 'fd2f12cf':
  FS-11995: [mod_fifo, mod_directory] Fix database availability check.

* commit 'aaacaa19':
  FS-12026 [mod_http_cache] fix multichannel file download and play
  FS-12026 [mod_httapi] fix multichannel file download and play

Merge pull request #1793 in FS/freeswitch from ~INFOMIND/freeswitch:bugfix/FS-11993-fix-gcc-errors-when-building-on-rpi4-buster to master

* commit '7a4a988d':
  FS-11993 [mod_http_cache][mod_smpp] fix gcc errors when building on rpi4 buster (strncpy to snprintf)

FS-11993 [mod_http_cache][mod_smpp] fix gcc errors when building on rpi4 buster (strncpy to snprintf)

FS-11993 [mod_http_cache][mod_smpp] fix gcc errors when building on rpi4 buster (strncpy to snprintf)

FS-12022: [mod_event_socket] Add Job-Owner-UUID with session uuid when using bgapi inside outbound socket

Merge pull request #1800 in FS/freeswitch from bugfix/FS-12001-mod_callcenter-can-t-use-mod_mariadb-with-mysql-due-to-keyword-on-table-schema to master

* commit '71b0ab24':
  FS-12001: [mod_callcenter] Workaround issues with renaming tables and columns in SQLite version prior to 2019-02-07 (3.27.0).