[monitoring-plugins] Fix a typo in help of check_mailq.

[RincewindsHat]

    Module: monitoring-plugins
    Branch: check_mailq_domain_specific_warnings
    Commit: 17d0a181071ebec9f1215d61905b27582cabde5e
    Author: Tobias Stein <grand.ouv...@googlemail.com>
 Committer: RincewindsHat <12514511+rincewinds...@users.noreply.github.com>
      Date: Fri Feb  7 14:28:47 2020 +0100
       URL: 
https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=17d0a18

Fix a typo in help of check_mailq.

* Change help from "--Critcal-domain" to "--critical-domain".

---

 plugins-scripts/check_mailq.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins-scripts/check_mailq.pl b/plugins-scripts/check_mailq.pl
index 820f89b..6e771db 100755
--- a/plugins-scripts/check_mailq.pl
+++ b/plugins-scripts/check_mailq.pl
@@ -667,7 +667,7 @@ sub print_help () {
        print "-w (--warning)         = Min. number of messages in queue to 
generate warning\n";
        print "-c (--critical)        = Min. number of messages in queue to 
generate critical alert ( w < c )\n";
        print "-W (--warning-domain)  = Min. number of messages for same domain 
in queue to generate warning\n";
-       print "-C (--Critical-domain) = Min. number of messages for same domain 
in queue to generate critical alert ( W < C )\n";
+       print "-C (--critical-domain) = Min. number of messages for same domain 
in queue to generate critical alert ( W < C )\n";
        print "-t (--timeout)         = Plugin timeout in seconds (default = 
$utils::TIMEOUT)\n";
        print "-M (--mailserver)      = [ sendmail | qmail | postfix | exim | 
nullmailer ] (default = autodetect)\n";
        print "-s (--sudo)            = Use sudo to call the mailq command\n";