Don't include SIP in the default installation

src/freedombone-app-sip

 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-VARIANTS='full full-vim chat'
+VARIANTS=''
 
-IN_DEFAULT_INSTALL=1
-SHOW_ON_ABOUT=1
+IN_DEFAULT_INSTALL=0
+SHOW_ON_ABOUT=0
 
 SIP_SERVER_PASSWORD=
 SIP_PORT=5060

src/freedombone-controlpanel

     echo '====='
     echo ''
     echo -n -e "$(pad_string 'Name')"
-    echo -n -e "$(pad_string 'SIP ext')"
+    if [[ $(app_is_installed sip) == "1" ]]; then
+        echo -n -e "$(pad_string 'SIP ext')"
+    fi
     echo -n -e "$(pad_string 'Data')"
     echo ''
-    echo '--------------------------------------------------------------------------'
+    echo '----------------------------------'
     for d in /home/*/ ; do
         USRNAME=$(echo "$d" | awk -F '/' '{print $3}')
         if [[ $(is_valid_user "$USRNAME") == "1" ]]; then