20 years ago rsc
Incorporate changes from Andrey Mirtchovski.
Initialization bug reported by Taj Khattra.
Add namespace.c
Add libmp.
Add some missing files.
Add most of libsec.
Add mkfile.
Make idiff build.
Don't require plumber.
Lots of new code imported.
Small tweaks
Change 9wm to look like rio.
Change 9term to look like rio windows, not acme windows.
Various header changes.
Various small interface changes.