Updated postrm script

Pre-1.2.0 configuration scripts are no longer copied and renamed.
Init scripts, ldconfig files and systemd service files are only removed if
they are found.

etc/postrm.in

@@ -1,13 +1,25 @@
 #!/bin/sh
+
+# The first argument is the number of packages left after
+# this one has been removed. If it is 0 then the package is being
+# removed from the system.
 if [ "$1" -eq 0 ]
 then
-    rm -f /etc/init.d/maxscale
+    if [ -f /etc/init.d/maxscale ]
-    rm -f /etc/ld.so.conf.d/maxscale.conf
-    rm -f /usr/lib/systemd/system/maxscale.service
-else
-    # Copy and rename config from old location
-    if [ -f "/usr/local/mariadb-maxscale/etc/MaxScale.cnf" -a ! -f "/etc/maxscale.cnf" ]
     then
-        cp "/usr/local/mariadb-maxscale/etc/MaxScale.cnf" "/etc/maxscale.cnf"
+        rm /etc/init.d/maxscale
+    fi
+
+    if [ -f /etc/ld.so.conf.d/maxscale.conf ]
+    then
+        rm /etc/ld.so.conf.d/maxscale.conf
+    fi
+
+    if [ -f /usr/lib/systemd/system/maxscale.service ]
+    then
+        rm /usr/lib/systemd/system/maxscale.service
+    elif [ -f /lib/systemd/system/maxscale.service ]
+    then
+        rm /lib/systemd/system/maxscale.service
     fi
 fi