316555 jetty.sh throws errors/warnings in older bash version

Fixing syntax of expr to be more resilient.

git-svn-id: svn+ssh://dev.eclipse.org/svnroot/rt/org.eclipse.jetty/jetty/trunk@1990 7e9141cc-0065-0410-87d8-b60c137991c4

jetty-distribution/src/main/resources/bin/jetty.sh

@@ -266,7 +266,7 @@ if [ -z "$CONFIGS" ] && [ -f "$JETTY_CONF" ] && [ -r "$JETTY_CONF" ]
 then
   while read -r CONF
   do
-    if expr "$CONF" : '^#' >/dev/null ; then
+    if expr "$CONF" : '#' >/dev/null ; then
       continue
     fi