strfmon: Fix negative sign handling for C locale

strfmon: EINVAL if the '+' flag and both signs are empty

strfmon: Add tests for Austin Group Defect 1199

strfmon: Fix typo s/poistion/position/

ipfilter: Load optionlist prior to ippool invocation

mtree: Keep mtree files indented with spaces

krb5: Use sh to run mk_cmds

file: Add a fdclose method

bhyve: add support for ng_device network backend

ng_device: add kqueue support

ng_device.c: improve compliance with style(9)

ng_device: enable setting the device to non-blocking mode

ng_device: replace dependency on vnode.h with fcntl.h

jail: Make jaildesc_ops const

gdb: Fix some PEP 8 violations