Merge changes made in Gnus trunk.

Merge changes made in Gnus trunk.

gnus-art.el: Make the "dumbquotes" translation work again.
gnus-registry.el (gnus-registry-split-fancy-with-parent): Splitting according to references/in-reply-to obeys the ignore-groups variable, while splitting by sender and subject do not.
nnimap.el (nnimap-request-group): Don't SELECT the group twice on `M-g'.
nnimap.el (nnimap-update-info): Update flags/read marks even if \* isn't part of the permanent marks.
gnus-coding.texi (Gnus Maintainance Guide): Update to mention Emacs bzr/Gnus git sync.
gnus-delay.el (gnus-delay-article): Remove superfluous `group' binding.
gnus-art.el (gnus-article-make-menu-bar): The article/group menus aren't so wide as to need to switch off the edit menu.