MagmaServerLoader-cmm.17

While working on the queries I noticed a couple of bugs worth applying to the current stable version (without queries), even though I think the queries version is right around the corner.

Keith Hodges submitted a great fix to allow relative path specification, thanks Keith!

A performance improvement attempted twice before is now finally realized, by minimizing the impact of shouldRemoveGarbageCollectedEntries. Sheesh, under certain circumstances we have been enduring some real pain, please feel free to speak up you guys so we can get these kinds of things knocked out!

These fixes will be in the upcoming queries version, of course.

- Chris