Documentation/branch: document -d --force and -m --force
Documentation/branch: document -d --force and -m --force

The --force option was modified in 356e91f (branch: allow -f with -m and
-d, 2014-12-08), but the documentation was not updated.

Signed-off-by: Matthieu Moy <d4d2cc2a6ec7b2aa587d4887cc5ed200f9b685a1@imag.fr>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git