Use Mercurial safe shares
See hg help format.use-share-safe
(available in 5.7, hence for Heptapod ≥ 0.21)
This solves problems with configuration not being properly forwarded to the Mercurial share by default. Heptapod components take care directly of some of these problems that were pretty obvious, but some may be missing, and it's better to have sane defaults even if everything is currently right.