golint: Fixup issues found in the report

This also increases the max allowed to 5% -- I'm happy to make this
lower if someone asks.

test/test-golint.sh

@@ -8,7 +8,7 @@ echo running test-golint.sh
 # FIXME: test a range of commits, since only the last patch is checked here
 PREVIOUS='HEAD^'
 CURRENT='HEAD'
-THRESHOLD=15	# percent problems per new LOC
+THRESHOLD=5	# percent problems per new LOC
 XPWD=`pwd`
 ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && cd .. && pwd )"	# dir!
 cd "${ROOT}" >/dev/null