Log Message:
-----------
Mention why it is hard to implement pg_resetxlog -n.
Modified Files:
--------------
pg_migrator/src:
controldata.c (r1.24 -> r1.25)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/controldata.c?r1=1.24&r2=1.25)