MFC r254018:
Pass variables prefixed with both LD_ and LD_32_ to the run-time linker.
This prevents unintentional execution of programs when running ldd(1) on
32-bit Linux binaries.
Merged r254809 and 254937 from head:

. Fix "2step" feature (i.e. 360 KiB media in 1200 KiB drives)
. Fix FDOPT_NOERROR option
MFC r255090 and r255128:
Add more USB IDs.

PR:		kern/181728