debian: add new and vastly improved packaging for Debian

We now break out each module and component of FreeSWITCH into a
separate individually-installable package.  For each package with
executables or modules, we also build a package that includes the
stripped debugging symbols so that users can be helpful when they
discover bugs in FreeSWITCH.

As of this commit, we successfully build 263 distinct binary packages
starting from a clean minimal image on both Debian Sid and Debian
Squeeze.

To keep this manageable, we include a program that generates the
various Debian packaging files from a consolidated description of the
modules and their metadata.  The program can even generate this
configuration file by walking the FreeSWITCH source tree.

To provide a smooth user experience, we provide meta-packages that
install sensible sets of modules and other components.

All files are installed into the traditional and customary Linux
directories that you would expect in accordance with the Filesystem
Hierarchy Standard (FHS).

This commit also adds support for running FreeSWITCH as a forked
systemd service in Debian.

For more information about the technical details of the source
packaging, how to build the binary packages from source, and how you
can contribute, please read debian/README.source.

To learn about how this packaging affects you as a user and how to use
the finished Debian packages, read debian/README.Debian.

Signed-off-by: Travis Cross <tc@traviscross.com>

debian/freeswitch-sysvinit.freeswitch.init

@@ -0,0 +1,116 @@
+#!/bin/sh
+### -*- mode:shell-script; indent-tabs-mode:nil; sh-basic-offset:2 -*-
+### BEGIN INIT INFO
+# Provides: freeswitch
+# Required-Start: $network $local_fs
+# Required-Stop:
+# Default-Start: 2 3 4 5
+# Default-Stop: 0 1 6
+# Short-Description: FreeSWITCH Softswitch
+# Description: FreeSWITCH Softswitch
+### END INIT INFO
+
+# Author: Travis Cross <tc@traviscross.com>
+
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+DESC=freeswitch
+NAME=freeswitch
+DAEMON=/usr/bin/freeswitch
+DAEMON_ARGS="-u freeswitch -g freeswitch -rp -nc -nonat"
+USER=freeswitch
+PIDFILE=/var/run/$NAME/$NAME.pid
+SCRIPTNAME=/etc/init.d/$NAME
+WORKDIR=/var/lib/$NAME
+
+[ -x $DAEMON ] || exit 0
+[ -r /etc/default/$NAME ] && . /etc/default/$NAME
+. /lib/init/vars.sh
+. /lib/lsb/init-functions
+
+do_start() {
+  start-stop-daemon --start --quiet \
+    --pidfile $PIDFILE --exec $DAEMON --name $NAME --user $USER \
+    --test > /dev/null \
+    || return 1
+  ulimit -s 240
+  start-stop-daemon --start --quiet \
+    --pidfile $PIDFILE --exec $DAEMON --name $NAME --user $USER \
+    --chdir $WORKDIR -- $DAEMON_ARGS $DAEMON_OPTS \
+    || return 2
+  return 0
+}
+
+stop_fs() {
+  start-stop-daemon --stop --quiet \
+    --pidfile $PIDFILE --name $NAME --user $USER \
+    --retry=TERM/30/KILL/5
+}
+
+stop_fs_children() {
+  start-stop-daemon --stop --quiet \
+    --exec $DAEMON \
+    --oknodo --retry=0/30/KILL/5
+}
+
+do_stop() {
+  stop_fs
+  RETVAL="$?"
+  [ "$RETVAL" -eq 2 ] && return 2
+  stop_fs_children
+  [ "$?" -eq 2 ] && return 2
+  rm -f $PIDFILE
+  return "$RETVAL"
+}
+
+do_reload() {
+  start-stop-daemon --stop --quiet \
+    --pidfile $PIDFILE --name $NAME --user $USER \
+    --signal HUP
+}
+
+case "$1" in
+  start)
+    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC " "$NAME"
+    do_start
+    case "$?" in
+      0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+      2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+    esac
+    ;;
+  stop)
+    [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
+    do_stop
+    case "$?" in
+      0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+      2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+    esac
+    ;;
+  status)
+    status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
+    ;;
+  reload|force-reload)
+    log_daemon_msg "Reloading $DESC" "$NAME"
+    do_reload
+    log_end_msg $?
+    ;;
+  restart)
+    log_daemon_msg "Restarting $DESC" "$NAME"
+    do_stop
+    case "$?" in
+      0|1)
+        do_start
+        case "$?" in
+          0) log_end_msg 0 ;;
+          1|*) log_end_msg 1 ;;
+        esac
+        ;;
+      *) log_end_msg 1 ;;
+    esac
+    ;;
+  *)
+    echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
+    exit 3
+    ;;
+esac
+
+exit 0