Format all sources with Uncrustify

Formatted all sources and manually tuned some files to make the code look
neater.

maxscale-system-test/regexfilter1.cpp

@@ -1,6 +1,6 @@
 /**
  * @file regexfilter1.cpp Simple regexfilter tests; aslo regression case for mxs508 ("regex filter ignores
- *username")
+ * username")
  *
  * Three services are configured with regexfilter, each with different parameters.
  * All services are queried with SELECT 123. The first service should replace it