[master] Delete trailing whitespace in ChangeLog

ChangeLog

@@ -9,8 +9,8 @@
 647.	[func]		tmark
 	Added initial implementation of classes for sending
 	and receiving NameChangeRequests between DHCP-DDNS
-	and its clients such as DHCP. This includes both 
-	abstract classes and a derivation which traffics 
+	and its clients such as DHCP. This includes both
+	abstract classes and a derivation which traffics
 	requests across UDP sockets.
 	(Trac #3008, git b54530b4539cec4476986442e72c047dddba7b48)