location-importer: Replace "UK" with "GB"

Apparently, LACNIC does not to proper input validation on supplied
country codes, so people can use "UK", while they probably mean "GB"
instead.
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

src/python/location-importer.in

@@ -734,6 +734,10 @@ class CLI(object):
 						# ... but keep this list distinct...
 						continue
 
+				# When people set country codes to "UK", they actually mean "GB"
+				if val == "UK":
+					val = "GB"
+
 				inetnum[key].append(val)
 
 		# Skip empty objects