Seems to work on ASA 5510 (with some tweaking)

Had to make the following changes to get it to work on an ASA5510 HA pair:
Remove:
use lib ‘/usr/lib/nagios/plugins’;
use utils qw (%ERRORS $TIMEOUT);

Insert:
my $TIMEOUT = 15;
my %ERRORS=(‘OK’=>0,’WARNING’=>1,’CRITICAL’=>2,’UNKNOWN’=>3,’DEPENDENT’=>4);

Else gives CRITICAL error with (null) response though it works from command line