When all-reg-options-ping is enabled, this adds a new custom event to mod_sofia
(sofia::sip_user_state), which is fired when a client stops responding to such
ping packets (or when it is reachable again).

Add two needed new columns to the sip_registrations table:
  - ping_status, which is "Reachable" or "Unreachable" depending on the client
    status;
  - ping_count, which tracks the number of ping responses received and is used
    to provide some kind of hysteresis to avoid firing the event in case of
    transitory network failures.

Then ping_count is checked against two threshold values, sip-user-ping-min
and sip-user-ping-max in a similar fashion as the ping-{max,min} options for
the gateways. These two values are configurable in the profile's xml
configuration file.

Also, if unregister-on-options-fail is enabled, the client is unregistered
based on the number of OPTIONS failure which is also checked against the
sip-user-ping-{min,max} values.

* commit 'e4f77140':
  make the gateway parameters to make the gateways samples the same
  make vanilla configuration gateways easier to understand for new users

It was noticed that the sample gateways were diferent. Brian West
suggest that I merge all the parameters into both examples.
fs-6859

Merge pull request #52 in FS/freeswitch from ~DDRAGIC/freeswitch:gsmopen_feature_additions to master

* commit 'a9b2e061':
  mod_gsmopen: clean up "gsm list" output a little
  mod_gsmopen: convert reported RSSI from AT+CSQ to dBm.
  mod_gsmopen: get device manufacturer, model and firmware version info.
  mod_gsmopen: add support for reading own number from ON phonebook using AT+CNUM
  mod_gsmopen: add AT+COPS support to get operator name.

Merge pull request #54 in FS/freeswitch from ~DDRAGIC/freeswitch:bugfix/FS-6820-mod_gsmopen-executing-gsm-reload to master

* commit '9423953e':
  FS-6820 mod_gsmopen: fix total interfaces count when executing gsm reload

Merge pull request #42 in FS/freeswitch from ~DDRAGIC/freeswitch:FS-6799_fix_msg_index_check to master

* commit '9cf72b54':
  FS-6799 fix reading sms in index 0

having the same gateway definition bound to the ipv6 and ipv4 external
profiles caused confusion for some new users. Also having a gateway
bound to the internal profile was a bit confusing.
fs-6859

At least some versions of GCC appear to take any -Wno-foo option
without error even if that option is not supported.  But they will
error out if -Wno-error=foo is used.  This sounds like a GCC bug, but
we'll work around it and test for the feature both ways.

Thanks-to: Matteo Brancaleoni <mbrancaleoni@voismart.it>

FS-6850 #resolve

With this commit, passing -Q to fs_cli will cause fs_cli to not load
or save the command history file (~/.fs_cli_history).  This can be
useful e.g. on read-only systems.

This can also be set in the fs_cli configuration file with the option
`no-history-file`.

The debian/control-modules file is a comprehensive list of modules,
not a list of modules which are built.  Our build tools verify the
file is comprehensive, so modules can't be removed from here unless
we're taking them out of tree.

Partially revert "don't package mod_cluechoo and don't build/load by default"
This partially reverts commit e02e41a5.

FS-6842 #resolve mod_graylog2: added send-uncompressed-header param- set to true for logstash support

fix possible buffer overrun in websocket uri and sync the ws.c between sofia and verto (missing code from last commit)

To work correctly in a multi-threaded environment, curl needs to be
used with CURLOPT_NOSIGNAL set to 1.  If it's left at zero, the
default, then curl will use signals to deal with timeouts which will
often result in a crash.

ref: http://curl.haxx.se/libcurl/c/libcurl-tutorial.html#Multi-threading
ref: http://curl.haxx.se/libcurl/c/CURLOPT_NOSIGNAL.html
ref: http://stackoverflow.com/questions/9191668/error-longjmp-causes-uninitialized-stack-frame
ref: https://bugzilla.redhat.com/show_bug.cgi?id=539809
ref: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=570436

Replace tabs with spaces and add two columns, operator and imei.

Add to gsmopen_dump and events.

Markdown treats this as an H1 otherwise.

This makes it visually clearer what the reader is looking at and
highlights that we want a real name as the author name.

We want to highlight that lines are hard wrapped in a commit message,
and using the typical Markdown blockquote syntax fails to achieve
that.