XLogDir

A recent change made XLogDir dynamically sized.  There was a question of
whether this was a good idea since there are lots of other places that
use MAXPGPATH.

I have now found that pg_resetxlog doesn't compile anymore because
XLogDir is a char* now instead of a char[].

Should I fix pg_resetxlog or revert the XLogDir change in the backend.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
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