Allow compile time definition of the directory to store openvassd.rules
diff -ru openvas-scanner-3.2.2/CMakeLists.txt openvas-scanner-3.2.2.new/CMakeLists.txt
--- openvas-scanner-3.2.2/CMakeLists.txt	2011-03-19 18:42:55.000000000 +0100
+++ openvas-scanner-3.2.2.new/CMakeLists.txt	2011-03-19 18:42:09.000000000 +0100
@@ -167,7 +167,10 @@
 set (OPENVASSD_MESSAGES "${OPENVAS_LOG_DIR}/openvassd.messages")
 set (OPENVASSD_DEBUGMSG "${OPENVAS_LOG_DIR}/openvassd.dump")
 set (OPENVASSD_CONF     "${OPENVAS_SYSCONF_DIR}/openvassd.conf")
-set (OPENVASSD_RULES    "${OPENVAS_DATA_DIR}/openvassd.rules")
+
+if (NOT OPENVASSD_RULES)
+  set (OPENVASSD_RULES    "${OPENVAS_DATA_DIR}/openvassd.rules")
+endif (NOT OPENVASSD_RULES)
 
 set (NVT_TIMEOUT "320")