duplicate the work of utils/zmeditconfigdata.sh
https://github.com/ZoneMinder/ZoneMinder/commit/5a59a0375dd19f8e5af9b2acadec9f2bb16ee56c

diff -ruN ZoneMinder-1.30.4.orig/scripts/ZoneMinder/lib/ZoneMinder/ConfigData.pm.in ZoneMinder-1.30.4/scripts/ZoneMinder/lib/ZoneMinder/ConfigData.pm.in
--- ZoneMinder-1.30.4.orig/scripts/ZoneMinder/lib/ZoneMinder/ConfigData.pm.in   2017-08-30 14:55:31.894727925 +0100
+++ ZoneMinder-1.30.4/scripts/ZoneMinder/lib/ZoneMinder/ConfigData.pm.in        2017-08-30 14:57:05.050731752 +0100
@@ -507,7 +507,7 @@
   },
   {
     name        => "ZM_PATH_ZMS",
-    default     => "/cgi-bin/nph-zms",
+    default     => "/zm/cgi-bin/nph-zms",
     description => "Web path to zms streaming server",
     help        => qqq("
       The ZoneMinder streaming server is required to send streamed