in status checks, clear bind9 cache using rndc rather than restarting bind9

CHANGELOG.md

 CHANGELOG
 =========
 
+in development
+--------------
+
+Control panel:
+
+* The local DNS cache is cleared before running the status checks using 'rncd' now rather than restarting 'bind9', which should be faster and wont interrupt other services.
+
 v0.05 (November 18, 2014)
 -------------------------
 

management/status_checks.py

@@ -18,8 +18,8 @@ from mailconfig import get_mail_domains, get_mail_aliases
 from utils import shell, sort_domains, load_env_vars_from_file
 
 def run_checks(env, output):
-	# clear the DNS cache so our DNS checks are most up to date
-	shell('check_call', ["/usr/sbin/service", "bind9", "restart"])
+	# clear bind9's DNS cache so our DNS checks are up to date
+	shell('check_call', ["/usr/sbin/rndc", "flush"])
 	
 	# perform checks
 	env["out"] = output