fix parsing of relative branch paths

reset dentry buffer when rewind'ed

Merge pull request trapexit#856 from trapexit/dirname

dirname should not return an empty string

Merge pull request trapexit#851 from trapexit/fix

fix segv: zero out data structures

Merge pull request trapexit#845 from trapexit/configfile

config: fix invalid error check when parsing config file

Merge pull request trapexit#835 from trapexit/readme

README.md: add details on per branch minfreespace

inodecalc: add 32bit versions of hashs

Merge pull request trapexit#716 from trapexit/mount

rework makefiles + install mount tools

Merge pull request trapexit#677 from trapexit/moveonenospc

fix short writes on >2GB files when cloning file

Merge pull request trapexit#663 from trapexit/random

only return 1 branch for rand/eprand policies