MFC r235128:
Add missing LibUSB 1.0 API function: libusb_get_string_descriptor().
MFC revision 259907
use the correct netmap <-> nic slot mapping on the transmit ring for 'lem'.
This bug would manifest only in netmap mode and on packets transmitted after
a NIC reset while netmap mode is active.
Revert MFC of r260102 for now, until I can merge the required fix from
head.  This should fix building modules which require -fms-extensions to
compile them with gcc.
MFC r258901:

svn r251516 resized the buf argument a bit too much. Pass a hardcoded
size of 6 to humanize_number() to resolve this.

PR:     bin/184405
Submitted by:   jhb
[automated] Merge in upstream-github/stable/9