prun: Add user config

Common config file: /etc/prunrc
User config file: $HOME/.prunrc

--- prun
+++ prun.suse
@@ -11,7 +11,8 @@
 # See the License for the specific language governing permissions and
 #    limitations under the License.
 
-CONFIG=/etc/sysconfig/prun
+CONFIG=/etc/prunrc
+LOCALCONFIG=$HOME/.prunrc
 MODE=native
 LOGLEVEL=2     # 0=error,1=warn,2=info,3=debug
 
@@ -33,7 +34,9 @@
 
 function parse_config_file () {
 
-    if [ -e $CONFIG ];then
+    if [ -e $LOCALCONFIG ];then
+        source $CONFIG 2> /dev/null
+    elif [ -e $CONFIG ];then
         source $CONFIG 2> /dev/null
     fi
 }