linking hba.c

In trying to decide how to keep ODBC compilable standalone, I can't
figure out how to get md5.c in there from backend/libpq.  Is it crazy to
put md5.c in interfaces/odbc and symlink it from there to backend/libpq
and interfaces/libpq?  I don't want to have two copies of md5.c but that
may be another option.  Opinions?

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
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