Index: openacs-4/packages/acs-tcl/tcl/security-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/security-procs.tcl,v
diff -u -N -r1.78.2.54 -r1.78.2.55
--- openacs-4/packages/acs-tcl/tcl/security-procs.tcl	22 Apr 2017 18:11:54 -0000	1.78.2.54
+++ openacs-4/packages/acs-tcl/tcl/security-procs.tcl	4 May 2017 06:20:18 -0000	1.78.2.55
@@ -2018,6 +2018,12 @@
     }
 
     #
+    # Remove trailing dot, as this is allowed in fully qualified DNS
+    # names (see e.g. §3.2.2 of RFC 3976).
+    #
+    set hostName [string trimright $hostName .]
+    
+    #
     # Check, if the provided host is the same as the configued host
     # name for the current driver or one of its IP addresses. Should
     # be true in most cases.