inhibit: add missing locking in wrapper for obsmarker creation
The develwarning for transaction without lock rightfully pointed out to this
issue. Before this patch we were not locking in the transaction for obsmarker
creation and therefore showing the warnings.
evolve: (issue4386) cleanup, split, fold and bijection in `hg prune`
Before this patch, the prune command was splitting and folding implicitely
based on the number of successors and precursors. This patch makes the
two behavior explicit by requesting a flag to perform a split or a fold.