Rename confusing method name and add correctly functioning one.

This fixes portable mode when running from a jar only.

Change-Id: I8272e2ff2fe1c6d88d6f6c41c859eb2d2124e04c
Issue: CLIENT-496
Reviewed-on: http://gerrit.dmdirc.com/3401
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>