Fix a broken link in the holds docs

Signed-off-by: Remington Steed <rjs7@calvin.edu>
Pull in 2.5 version upgrade files

For 2.5.0 and 2.5.1

Signed-off-by: Dan Wells <dbw2@calvin.edu>
Forward port 2.3.11->2.3.12 DB upgrade

Signed-off-by: Bill Erickson <berick@esilibrary.com>
Pushing upgrade scripts forward

Signed-off-by: Mike Rylander <mrylander@gmail.com>