Homedir .gitignore when using vcsh

[Olaf TNSB]

Probably the main problem I have with this approach currently is that when
I add new content to gitignore-global.base I need to run 'mr up' for the
"fixup" code to be executed.

Can anyone (@joeyh?) suggest a way to kick off the fixup without having to
run the update? My other thought was to put the code in a "lib =" & modify
the default update, checkout and status commands...