[mosh] Use --test to trigger configuration unit test

mobile-shell#431

Add undocumented --test option that will trigger the unit test in
the ConfigFile class.

Signed-off-by: Earl Chew <earl_chew@yahoo.com>

scripts/mosh

@@ -433,6 +433,7 @@ my $term_init = 1;
 
 my $help = undef;
 my $version = undef;
+my $unittest = undef;
 
 my @cmdline = @ARGV;
 
@@ -499,9 +500,16 @@ GetOptions( 'client=s' => \$client,
 	    'init!' => \$term_init,
 	    'help' => \$help,
 	    'version' => \$version,
+            'test' => \$unittest,
 	    'fake-proxy!' => \my $fake_proxy,
 	    'bind-server=s' => \$bind_ip) or die $usage;
 
+if ( defined $unittest ) {
+  $configFile->testSplitLine();
+  $configFile->testConfigFile();
+  exit(0);
+}
+
 die $usage if ( defined $help );
 die $version_message if ( defined $version );