Add missing unlink().  Update debug messages, move one from spew_file().
Also check the close() return code.

Currently index.html is broken, thought this was a problem, but it isn't. Will keep digging. Seems to be something that broke on the 5th of August, as that was the last complete index.html I had.

default is 2x entry cache size

TODO: rip this all out and just use tool_entry_get