man pages: FI_SEND_BUFFERED -> FI_INJECT, remove sendto/recvfrom refs

Signed-off-by: Reese Faucette <rfaucett@cisco.com>
Merge pull request #349 from rfaucett/pr/fi_man

man pages: FI_SEND_BUFFERED -> FI_INJECT, remove sendto/recvfrom refs
Updated nroff-generated man pages
update man pages describing accepting connections

Signed-off-by: Reese Faucette <rfaucett@cisco.com>
usnic: make semi-official way to call usd_fill_udp_dest() from usdf
usnic: fix prototypes for dgram sends to include dest_addr
usnic: minor cleanups

A few general types of cleanups:

1. Make functions static that do not need to be public
2. Include missing .h files to get prototypes for symbols that are used
3. #if 0 out a debugging function
4. Fix a few prototypes (e.g., () -> (void))
Merge pull request #356 from jsquyres/pr/usnic-cleanups

usnic cleanups
Merge pull request #351 from rfaucett/pr/accept

fi_accept: connreq is specified as an arg in man pages but missing
Updated nroff-generated man pages
Merge branch 'master' into usdf
remove some junk
conns get established
connect and accept both complete
break everything again