DragonFlyBSD/src 30573b9. Makefile.inc1, bin/csh Makefile

btools: Remove /bin/csh from the list.

Our buildworld infrastructure does not use it (/bin/sh is used).
The csh is quite a complicated shell (ncurses, crypto deps).
One place less to trip while upgrading to newer releases.
This should simplify all the private libs handling.
DeltaFile
+1-17bin/csh/Makefile
+1-1Makefile.inc1
+2-182 files

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