Experimental implementation: renewal, block, enable.

Experimental implementation: renewal, block, enable.

Add sip_renewal (not implemented), correct log message w/ join

Patron block message and patron enable

This adds code for enable, still experimental.  It also adds the
client's block message to the patron alert, bracketed by <sip> tags.
The tags are necessary because enable has to be able to regexp out
the block alert message (including user-specified variable text).

Remove unused vars.
Whitespace cleanup and extra feedback data.

Return object on failure, not just 0

Signed-off-by: Joe Atzberger <atz@esilibrary.com>
git-svn-id: svn://svn.open-ils.org/ILS/trunk@16598 dcc99617-32d9-48b4-a31d-7c20da2025e4