Add test-humanize_number

Sponsored-by: EMC / Isilon Storage Division
Fix good_script by using sh instead of csh in #!

Sponsored-by: EMC / Isilon Storage Division
Fix the testcase indexing

Sponsored-by: EMC / Isilon Storage Division
Disable testcase # 16

The threads don't handle EINTR and the requirements tested are not clear
(the comments mix and match requirements, potentially a copy-paste error
from other testcases).

Sponsored-by: EMC / Isilon Storage Division