Log Message:
-----------
Print file name and errno string on rmtree failure.
Backpatch to 8.0.X.
Modified Files:
--------------
pgsql/src/port:
dirmod.c (r1.34 -> r1.35)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/port/dirmod.c.diff?r1=1.34&r2=1.35)