#13 Fix for docmgr-0.53.3 and postgresql 8.1

[Eric Lawman]

This patch will make DocMGR 0.53.3 postgresql 8.1
compatible. 8.1 no longer uses OIDs by default, which
we use to return the id of a record inserted into a
table. Now, if the LASTVAL() function is available
(which it is in 8.1), we use that. Otherwise we fall
back on the OID.

Apply this patch by copying it to the include/
directory and running "patch -p0 < pgsql.81.diff"

[Eric Lawman]