mxrouterctl: Move main code down

Move start of main code down to after subs to make the file easier to
read.

mxrouter/mxrouterctl

@@ -628,25 +628,6 @@ sub veth {
 	$want_veth->{$dev} = 1;
 }
 
-my @SAVED_ARGV=@ARGV;
-
-GetOptions(OPTIONS) or die USAGE;
-@ARGV>=1 or die USAGE;
-
-my ($cmd)=@ARGV;
-
-our $CONFIG_FILE="/etc/local/mxrouter/$NETNS.cf.pl";
-
-unless (-e $CONFIG_FILE) {
-	warn "$0 : ignored - no file $CONFIG_FILE\n";
-	exit;
-}
-
-unless (defined do "$CONFIG_FILE") {
-	die "$CONFIG_FILE: $@\n" if $@;
-	die "$CONFIG_FILE: $!\n";
-}
-
 sub dhcrelay_forward {
 	my ($ip)=@_;
 	$DHCRELAY_FORWARD=$ip;
@@ -760,6 +741,27 @@ sub start_process_if {
 	start_process($process);
 }
 
+##########################################
+
+my @SAVED_ARGV=@ARGV;
+
+GetOptions(OPTIONS) or die USAGE;
+@ARGV>=1 or die USAGE;
+
+my ($cmd)=@ARGV;
+
+our $CONFIG_FILE="/etc/local/mxrouter/$NETNS.cf.pl";
+
+unless (-e $CONFIG_FILE) {
+	warn "$0 : ignored - no file $CONFIG_FILE\n";
+	exit;
+}
+
+unless (defined do "$CONFIG_FILE") {
+	die "$CONFIG_FILE: $@\n" if $@;
+	die "$CONFIG_FILE: $!\n";
+}
+
 if (!$opt_this_ns) {
 	if ($cmd eq 'start') {
 		# neighbour table thresholds