rdiff: incorporate sshoptions into options via remote-schema if not there

ChangeLog

@@ -4,6 +4,8 @@ version 0.9.6 -- unreleased
     handler changes
 	rdiff: 
 	 . Fixed ignore_version default value missing
+	 . Add patch from Matthew Palmer to rdiff handler to incorporate sshoptions 
+	   into options via remote-schema not already specified (Closes: #424639)
 	wget:
 	 . New handler from rhatto designed to incrementally pull content from
 	   a website to a local folder, based on the rsync handler

handlers/rdiff.in

@@ -101,6 +101,10 @@ getconf host; desthost=$host
 getconf sshoptions
 check_consistency "destination" "$type" "$user" "$host"
 
+if [ -n "$sshoptions" ] && echo $options | grep -qv "remote-schema"; then
+	options="$options --remote-schema 'ssh -C $sshoptions %s rdiff-backup --server'"
+fi
+
 ### CHECK CONFIG ###
 
 # If vservers are configured, check that the ones listed in $vsnames do exist.