Rejoining open channels is now more efficient
Rejoining open channels is now more efficient

Fixes issue 3865

Change-Id: I9a46ea61914dc1da88196cf234afc4c5b03aff17
Reviewed-on: http://gerrit.dmdirc.com/984
Automatic-Compile: Chris Smith <711c73f64afdce07b7e38039a96d2224209e9a6c@dmdirc.com>
Reviewed-by: Gregory Holmes <79e2475f81a6317276bf7cbb3958b20d289b78df@dmdirc.com>

greboid/DMDirc,DMDirc/DMDirc,ShaneMcC/DMDirc-Client,ShaneMcC/DMDirc-Client,ShaneMcC/DMDirc-Client,greboid/DMDirc,csmith/DMDirc,greboid/DMDirc,greboid/DMDirc,DMDirc/DMDirc,csmith/DMDirc,csmith/DMDirc,DMDirc/DMDirc,csmith/DMDirc,ShaneMcC/DMDirc-Client,DMDirc/DMDirc