pathencode: skip encoding if input is already longer than maxstorepathlen Calling basicencode may make the path longer, never shorter. If it's already too long before, then we don't even need to basicencode it.

pathencode: simplify basicencode

test-hybridencode: in practice, extensions aren't really unbound in length due to the fact that we only get to encode files ending in .i and .d inside the store

Merge