Patch to add "end" time to events

Attached is some code that will allow users to enter end times into events. End times will NOT be displayed if no end time is entered. This is because the patch checks to see if the end time is before the start time. If it is, it assumes the event does not have a set end time and will not display it.

INSTALLING THE PATCH
==================
++++++++++++++++++

STEP 1: Update database
===================
For the patch to work, you must also add a field into your event table. The name of the field is 'end' and its properties are identitical to the 'start' field. It will hold a timestamp of the end time.

You create this column by using the ALTER TABLE mysql command. First log into the mysql database. Then type 'use '. Then issue the following command:

ALTER TABLE event ADD end int(10) unsigned NOT NULL default '0';

(If you are not using a mysql database, I can't help you. You will have to look up the appropriate commands yourself.)

STEP 2: Install patch
================
To install the patch, drop it into your event.module directory and issues the following command:
patch -p0 event.module event_add_end_time-v1.patch

TECHNICAL NOTES
==============
++++++++++++++

The patch adds a new function to the module called event_validate_time(). Much of the code in event_validate_time() was pulled out of the event_validate() function and modified slightly so it could validate both start times and end times. The new event_validate() function gets called twice by the event_validate() function, once for the start time and once for the end time.

The form is modified by adding the end time form items. It also gives the start time form item names a prefix, 'start_', and the end time form item names a prefix, 'end_'. This is how the two identical time form items are differentiated from each other. The addition of the name prefix is accomplished by passing the prefix string to the event_form_date() function.