replicaiton: log rate and transport type

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

PVE/Replication.pm

@@ -312,6 +312,9 @@ sub replicate {
 	my $rate = $jobcfg->{rate};
 	my $insecure = $migration_type eq 'insecure';
 
+	$logfunc->("using $migration_type transmission, rate limit: "
+	    . ($rate ? "$rate MByte/s" : "none"));
+
 	foreach my $volid (@$sorted_volids) {
 	    my $base_snapname;