Merge branch '6109-rspamd-inc-ispc-naming-inconsistency' into 'develop'

Resolve "rspamd .inc.ispc naming inconsistency"

Closes #6109

See merge request ispconfig/ispconfig3!1446

Author: Marius Burkard

install/lib/installer_base.lib.php

@@ -1887,10 +1887,10 @@ public function configure_rspamd() {
 
 		# local.d/maps.d templates without template tags
 		$maps_d = array(
-			'dkim_whitelist.inc',
-			'dmarc_whitelist.inc',
-			'spf_dkim_whitelist.inc',
-			'spf_whitelist.inc',
+			'dkim_whitelist.inc.ispc',
+			'dmarc_whitelist.inc.ispc',
+			'spf_dkim_whitelist.inc.ispc',
+			'spf_whitelist.inc.ispc',
 		);
 		foreach ($maps_d as $f) {
 			if(file_exists($conf['ispconfig_install_dir']."/server/conf-custom/install/rspamd_${f}.master")) {