Support function calls with subfields, e.g. (func(args))."id".

Support function calls with subfields, e.g. (func(args))."id".

Note that this support treats the subfield as an optional
component of the functional call, not as a type of expression
in its own right.  A subsequent commit will eliminate the "xfld"
expression type.

M    Open-ILS/include/openils/oils_buildq.h
M    Open-ILS/src/c-apps/oils_storedq.c
M    Open-ILS/src/c-apps/buildSQL.c

git-svn-id: svn://svn.open-ils.org/ILS/trunk@16821 dcc99617-32d9-48b4-a31d-7c20da2025e4