Sofia will unpredictably close a tls transport during call setup. This
occurs when the epoll event loop wakes up the socket reader and SSL_read
returns an error because there is no packet on the socket. Normally
sofia will read the last error using SSL_get_error and return
SSL_ERROR_WANT_READ. Sofia gracefully handles this error and the
transport stays open. Sometimes, however, the worker thread will call
SSL_shutdown for a different transport, which can write an error to the
internal openssl error queue. If that error is not read off the queue,
the next time that SSL_get_error is called, it will read that unrelated
error.

The documentation for SSL_shutdown explains that there are three
possible results -1, 0 and 1 with, oddly, 1 indicating success. The -1
result code occurs when there is no handshake callback registered on the
connection. It can return 0 when there is still work to be done. The
documentation suggest that it is insufficient to call it just once. This
is why I added the do {} while () construct.

Although just the fix to SSL_shutdown was enough to resolve my issue, I
a also audited other calls to SSL_* functions and found a few other
cases where an error may be generated, but was not handled.

Merge pull request #829 in FS/freeswitch from ~PIOTRGREGOR/freeswitch:bugfix/FS-9117-avmd-build-fails-on-windows to master

* commit 'f476e23c':
  FS-9117 [avmd] #fix build on Windows

Merge in Ubuntu Packaging changes

* commit '7375ad9e':
  FS-9081 [Ubuntu Packaging] WIP Patches to build system and configure to allow FS to build on 14.04
  Revert "FS-9081 to build all modules for trusty needs the universe components"
  Revert "FS-9081 Correction to e8f83d05"

This reverts commit e8f83d05.

This reverts commit 1b9fda72.

Merge pull request #824 in FS/freeswitch from ~PIOTRGREGOR/freeswitch:feature/FS-9011-avmd-add-configuration-file to master

* commit 'bf140e9b':
  FS-9011 [avmd] Add XML config

This is a generated file that was added by commit:

    commit 77f52bb6
    "FS-7928 FS-7618 systemd and package build improvements"

We were missing mod_smpp; mod_json_cdr needed to be placed differently
in the file such that it matches the output of the automated generator
we use to check the completeness of this file.

Add XML configuration file.
Bind reloadxml callback.
Add safe parsers of user's input.
Add show/set/load/reload API commands.

FS-9086 #resolve [Video files playing in mod_conference do not count in totals for calculating layout]

Revert "FS-8704: Add min-members, wait-min-members-timeout, wait-mod-timeout, wait-min-members-timeout-message, wait-mod-timeout-message, endconf-mod-exit-message, and endconf-message parameters and functionality to mod_conference."

This reverts commit c39fbb29.

Merge pull request #825 in FS/freeswitch from ~SSINYAGIN/freeswitch:bugfix/FS-9075-debian-package-freeswitch-all-incompatible to master

* commit 'ce6af250':
  FS-9075 fixup for systemd and sysvinit

Merge pull request #822 in FS/freeswitch from bugfix/FS-9060-re-invite-with-bypass_media_after_bridge to master

* commit '0a8e115b':
  FS-9060: [mod_sofia] correct issues with hold and broken soa negotiations after performing a bypass media reinvite

Merge pull request #821 in FS/freeswitch from ~BKUHLS/freeswitch:bugfix/FS-9093-mod_cv-remove-unneeded-headers to master

* commit 'b024c752':
  FS-9093: mod_cv: remove unneeded includes