[Gnu-arch-users] [BUG] FEATURE PLANS: system branches

[Tom Lord]

System branches function similarly to downstream branches, except that
users are not permitted to create system branches or commit to them
directly or form downstream branches from them.  Only new higher-level
commands can create or commit to system branches.

Based on list feedack, a reasonable syntax might be:

        foo--mainline--1.0

        # A downstream branch:
        #
        foo--mainline:feature-a--1.0


        # A system branch:
        #
        foo--mainline+delta-tree--1.0

        # A system branch of of a downstream
        # brach:
        #
        foo--mainline;fetaure-a+delta-tree--1.0

        # FORBIDDEN:
        # 
        # A downstream branch of a system
        # brach (can not be created):
        #
        foo--mainline+delta-tree;fetaure-a--1.0

-t