rdiff.helper: generate 4096 bits RSA keys.

ChangeLog

@@ -30,6 +30,8 @@ version 0.9.9 -- UNRELEASED
 	dup:
 	 . Fix separate signing key usecase. Thanks to Ian Beckwith for
 	   the patch.
+	rdiff:
+	 . Generate 4096 bits RSA keys.
 
 version 0.9.8.1 -- October 31, 2010 (boo!)
     backupninja changes

handlers/rdiff.helper.in

@@ -168,7 +168,7 @@ do_rdiff_ssh_con() {
 
    if [ ! -f /root/.ssh/id_dsa.pub -a ! -f /root/.ssh/id_rsa.pub ]; then
       echo "Creating local root's ssh key"
-      ssh-keygen -t dsa -f /root/.ssh/id_dsa -N ""
+      ssh-keygen -t rsa -b 4096 -f /root/.ssh/id_rsa -N ""
       echo "Done. hit return to continue"
       read
    fi