Merge pull request #262 in FS/freeswitch from feature/FS-7587-add-ipv6-support-to-verto-websockets to master

* commit '3b2d00f3':
  FS-7587 Add ipv6 support to Verto / Websockets

* commit '8f343939':
  Added new options to nibble bill for minimum charges and rounding #FS-7560

* commit '441dd912':
  FS-7204, Allow to force a per-account send-message-query-on-register

* commit 'f135232e':
  FS-7196: add recording_follow_transfer support for semi attended transfers

These options are:

1) nibble_rounding: The number of decimal places to round the cost of the call to
2) nibble_minimum: The minimum charge to apply to a call

Rounding is applied before the minimum charging, and these steps only occur at call end to make sure they're accurate.

Checks for minimum_charge before call starts

"Billing done" flag to the data struct, and used that to exit early in the event processing during hangup has already occured.

* commit 'a4ef9d6b':
  FS-7405: if all is required don't pass if total ne pass

Merge pull request #232 in FS/freeswitch from ~ITALOROSSI/freeswitch:bugfix/FS-7242-delayed-bye-after-REFER to master

* commit 'beeea017':
  FS-7242 Waiting for state CS_PARK when receiving REFER.

* commit 'b4250c87':
  Fix switch_ivr_parse_event() to not hangup a session when there is no media yet

* commit 'f5e0a879':
  JIRA FS-7412. Added new LDAP schema (fsaccount.schema) with relevant attributes to match FS directory params and variables. Changed mod_xml_ldap code to reflect new schema. Updated xml_ldap.conf.xml as well to reflect mapping of new attributes.

FS-7593 --resolve  add locking keyed on device name around any database updates adding/removing the device

Ephemeral ECDH (ECDHE) was supported already. This patch adds Ephemeral
DH (DHE). To enable it, add DH parameters into the private-key file of
your server (agent.pem). For example via:
openssl dhparam -out dh.pem 2048

FS-7561 #resolve

FS-7513 add video-auto-floor-msec param to control how long a member must have the audio floor before also taking the video floor %NEEDS_DOC

little more tolerant of big timing errors between the symbols at the far end,
and as they are received by us.

* commit 'b641ab6d': (629 commits)
  bump
  FS-7519: CID:1294454 fix leak
  CID:1301145,1301144: Bit shift bounds checking
  CID 1216601 Fix a possible memory leak in mod_basic
  FS-7519 mod_av cleanup and refactor to work on higher resolution
  FS-7513 refactor
  FS-7500 FS-7499 refactoring while battling chrome
  FS-7585: add rtmp video support
  FS-7585: spaces to tabs and clean up trilling spaces
  FS-7519: reverting part of f85a86e64d3ebcd34d63bc6239694e5a524760a1
  FS-7519: fix build issue with clang-3.5
  FS-7500: start media thread one answer/pre_answer
  FS-7519: fix typo
  FS-7499 FS-7500 mods for interop against latest chrome builds
  FS-7500 just send refresh and not full reset on uuid_video_refresh
  FS-7513 mods to bandwidth sizing and remove flush calls
  FS-7519: auto set some values on avformat recording
  FS-7519: [mod_av] fix modules.conf
  FS-7519: merge mod_avcodec and mod_avformat into mod_av
  FS-7553 reduce opencv library requirement to 2.4.5 to allow centos 7
  ...