The .hgrc file
See http://www.selenic.com/mercurial/hgrc.5.html
Quote from "7.4.1 Shell-style glob patterns" in chapter 7 of the hgbook:
- The “⋆” character matches any string, within a single directory.
- The “⋆⋆” pattern matches any string, and crosses directory boundaries. It’s not a standard Unix glob token, but it’s accepted by several popular Unix shells, and is very useful.