Try to report source of bad Lua API calls
test-server: only listen to 127.0.0.1

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
Merge pull request #819 from Keruspe/unstable

test-server: only listen to 127.0.0.1
Merge pull request #1124 from ioddly/fix-issue-1121

Try to report source of bad Lua API calls