If I enter "@todo" into the task tag to look for, the task plugin will not find
any tasks at all. But if I changed into "todo" it found 139 instances. @todo is
used by doxygen to gather todo's in a report, but it would be nice if ther tasks
plugin could find them.

Steps to reproduce:
1. Setup project to find @todo
2. Create a file in the workspace containing " * @todo Move the default options
to"
3. Start the build

Expected outcome:
The task plugin would display 1 found task

Actual outcome:
No open tasks were found

Tasks - 2.16
Hudson 1.252