Checkout Fills Related Hold modifications

Checkout Fills Related Hold modifications

Two changes:

1 - Check hold_copy_map for related holds

This removes the "Title or Volume hold only" restriction, allowing any hold type to fill.
This check happens first whenever the option is enabled.

2 - Add new option for *only* checking hold_copy_map.

This allows for non-holdable copies to not fill Title or Volume holds on checkout.

Signed-off-by: Thomas Berezansky <tsbere@mvlc.org>
Signed-off-by: Bill Erickson <berick@esilibrary.com>