In oils_cstore.c, tightened validation for partial autojoins, i.e.

In oils_cstore.c, tightened validation for partial autojoins, i.e.
when the query specifies only one of the join columns.

When looking up the other join column in the IDL, make sure that the
link used points to the right table.  Also make sure that the reltype
for the link is not "has_many", because that would imply that the
link is virtual, and the designated column doesn't exist in the
database.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@12899 dcc99617-32d9-48b4-a31d-7c20da2025e4