[PATCH] Permit user to select keys when using sdiff merge

[Chuck Swiger]

Hi, all--

I'd like to submit a patch for your consideration.  It allows the user set an 
environment variable to use other keys in addition to "l" and "r" when 
performing a merge via sdiff, which could be used as follows:

env SDIFF_MERGE_KEYS='12' ./sdiff -o file3 file1 file2

http://www.pkix.net/~chuck/sdiff2.diff   [410 lines, ~10K]

The patch was made against diffutils-2.7, on FreeBSD 4.10-STABLE.

--
-Chuck