[RFA 00/67] Simple add_cmd constification

Tom Tromey
2017-09-21T05:12:57Z

First, left me offer my apologies for the length of this series. It
was somewhat simpler to break it into many tiny pieces, because
sometimes when const-ifying it is easy to get in over one's head. On
the plus side, nearly all of the patches are trivial and so review
should not be too difficult -- just boring.

This starts by adding const-correct overloads of add_cmd and a few
related functions. Then, it converts many functions to use the
const-correct form. The idea is to gradually convert all commands
(and set/show, etc) to const-correctness, then remove the non-const
overloads.

Regression tested on the buildbot.

Tom