[ksh93-integration-discuss] update on ksh93 integration

[April Chin]

Due to intermittent failures when running the ksh93 tests ("make testshell
in usr/src/cmd/ksh), we will unfortunately not be integrating ksh93 into 
build 71.  Roland and I have been investigating, and we believe the 
failures (core dumps) occur only in post-build 61 environments.

Hopefully we can resolve this soon and integrate into a subsequent build.

	April