Allow bookmark deletions
Repositories imported can contain bookmarks (see #143 (closed)) and since they are protected, they are not going to move. It is quite inconvenient, especially for bookmarks as meaningful as master.
I'd like to delete the bookmark master, but:
pierre@kth ~/t/fluidsim> hg bookmarks master 1264:e37c77fc8020 pierre@kth ~/t/fluidsim> hg book master -d pierre@kth ~/t/fluidsim> hg bookmarks no bookmarks set pierre@kth ~/t/fluidsim> hg push -B master pushing to ssh://firstname.lastname@example.org/fluiddyn/fluidsim searching for changes no changes found remote: Creating or updating bookmarks is forbidden by default in Heptapod. See https://heptapod.net/pages/faq.html#bookmarks to learn why and how to partially lift that restriction abort: push failed on remote