[ClamAV] Add specific db mirrors

data/conf/clamav/freshclam.conf

@@ -3,7 +3,10 @@ LogTime yes
 PidFile /run/clamav/freshclam.pid
 DatabaseOwner clamav
 DNSDatabaseInfo current.cvd.clamav.net
-DatabaseMirror database.clamav.net
+DatabaseMirror db.uk.clamav.net
+DatabaseMirror db.nl.clamav.net
+DatabaseMirror db.fr.clamav.net
+DatabaseMirror db.ch.clamav.net
 MaxAttempts 4
 ScriptedUpdates yes
 Checks 6