Whitespace cleanup

* remove trailing whitespace
* remove empty lines at the end of files

plugins/dkim/dkimproxy_mails

@@ -10,7 +10,7 @@
 #       autoconf (optional)
 #
 # Gives the result of the verification. The following values are possible:
-# 
+#
 # pass
 #     Returned if a valid DKIM-Signature header was found, and the signature contains a correct value for the message.
 #
@@ -22,9 +22,9 @@
 #
 # none
 #     Returned if no DKIM-Signature headers (valid or invalid) were found.
-# 
+#
 # In case of multiple signatures, the "best" result will be returned. Best is defined as "pass", followed by "fail", "invalid", and "none".
-# 
+#
 
 mktempfile () {
 mktemp -t
@@ -59,7 +59,7 @@ if [ "$1" = "config" ]; then
         echo 'dkiminvalid.label Invalid DKIM-Sigs'
         echo 'dkiminvalid.min 0'
         echo 'dkimfail.label Failed DKIM-Sigs'
-        echo 'dkimfail.min 0'        
+        echo 'dkimfail.min 0'
         exit 0
 fi