Pipelining of requests to improve throughput
     -- new parameter max-pipelined-requests (default 20) for maximum number of requests to batch at one time

   Deletion of counter keys when zero
     -- new parameter delete-when-zero (default false) to enable.  This will cause a redis eval to execute to decrement counters instead of DECR.

   Detection of negative limit counters
     -- Self healing of negative counters (due to key eviction, etc)

Revert "FS-9970 build debug Makefile.openbsd until it successfully builds FreeSWITCH. Add additional pkg dependencies. Replace wget with native OpenBSD ftp command"

This reverts commit 68ec2a68.

Merge pull request #1163 in FS/freeswitch from ~SYSFU/freeswitch:bugfix/FS-9968-update-and-debug-OpenBSD-Makefile to master

* commit '68ec2a68':
  FS-9968 build debug Makefile.openbsd until it successfully builds FreeSWITCH. Add additional pkg dependencies. Replace wget with native OpenBSD ftp command
  bump build tool and dependency version numbers.

FS-9968 build debug Makefile.openbsd until it successfully builds FreeSWITCH. Add additional pkg dependencies. Replace wget with native OpenBSD ftp command

   fax_t38_tx_reinvite_packet_count - overrides t38-tx-reinvite-packet-count param in spandsp.conf
   fax_t38_rx_reinvite_packet_count - overrides t38-rx-reinvite-packet-count param in spandsp.conf

* commit '606d5354':
  FS-9955 [mod_kazoo] set profile var when setting channel var

FS-9954: [freeswitch-core] Crash on switch_ivr_intercept_session due null pointer for buuid #resolve

Merge pull request #1154 in FS/freeswitch from ~DEDWARDS/freeswitch:feature/FS-9162-add-ability-to-include-the-external to master

* commit '15fd3f13':
  FS-9162 Include external IP address in SDP if include_external_ip is set

Merge pull request #1146 in FS/freeswitch from bugfix/FS-9206-proxy-media-with-enable-3pcc-proxy to master

* commit 'a597e216':
  FS-9206: [core] endable proxy media auto-adjust on re-invite for text and video every time as the streams may be being added on re-invite

FS-9206: [core] endable proxy media auto-adjust on re-invite for text and video every time as the streams may be being added on re-invite

Merge pull request #1151 in FS/freeswitch from ~ANDYWOLK/freeswitch:bugfix/FS-9948-add-mod_png-to-windows-build to master

* commit '7dce1172':
  FS-9948 [mod_png] Add mod_png to windows build

Merge pull request #1150 in FS/freeswitch from ~ANDYWOLK/freeswitch:bugfix/FS-9944-add-core-video-support-to-windows to master

* commit '1f11deb0':
  FS-9944 [core] Add core video support to windows build

FS-9943: [core] Default 488 handling for t.38 re-invite switches to udptl mode when it should not. #resolve

* commit '52e1785d':
  [mod_sofia] FS-9940 fix finding a-leg parameter

Merge pull request #1147 in FS/freeswitch from bugfix/FS-9931-display-updates-are-sent-to-endpoints to master

* commit '5d5b815e':
  FS-9931: [mod_sofia] don't send display updates to endpoints who don't have UPDATE in their Allow header

FS-9931: [mod_sofia] don't send display updates to endpoints who don't have UPDATE in their Allow header

FS-9932: [freeswitch-core] Error with group confirm feature combined with enterprise originate #resolve

FS-9929: [core,mod_spandsp] Assert in switch_frame_buffer_dup when receiving a fax using t.38 #resolve

%backport=1.6

* commit '392f0956':
  FS-9924: Removed libvpx dependency from SPEC file.

Merge pull request #1142 in FS/freeswitch from bugfix/FS-9844-sip_full_route-variable-doesnt-show to master

* commit 'f418baf7':
  FS-9844: [mod_sofia] populate sip_full_route var with all of the route headers, not just the first one