Typo fixes.

Change-Id: I402d52e9bd09192fee54584e24f0eff33fd581e4
Depends-On: I2028d8c1ddd14b276f373b9400265b25f0e5e939
Reviewed-on: http://gerrit.dmdirc.com/3697
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager
Update submodules: plugins (new commits)

plugins:
    80532bf Chris Smith <chris@dmdirc.com>
            Typo fixes

            Gerrit: http://gerrit.dmdirc.com/3696

Change-Id: I715015ddd293368bc98be76ebaf47b6d108f87f2