D1270: help: adding a topic on flags

[dlax (Denis Laxalde)]

dlax added inline comments.

INLINE COMMENTS

> flags.txt:30
> +In order to set a default value for a flag in an hgrc file, set it under the
> +[defaults] section of the hgrc file::
> +

`hg help config` says that "defaults" are deprecated and that aliases should be used instead.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D1270

To: rdamazio, #hg-reviewers
Cc: dlax, martinvonz, mercurial-devel