D3650: serve: add an option to open in the default browser

[pulkit (Pulkit Goyal)]

pulkit added a comment.


  Do we need this patch any more since https://phab.mercurial-scm.org/D3649 has landed and we can do `xdg-open "$(hg serve --print-url)"`?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3650

To: nspanti-logilab, #hg-reviewers
Cc: pulkit, av6, durin42, mercurial-devel