MFC r253870, r258698 (by gnn@), r259048, and r261534.

MFC r253870, r258698 (by gnn@), r259048, and r261534.

r253870:
Teach cxgbetool to display T5 congestion manager context.

r258698:
cxgbetool: "modinfo" command to display SFP+ module information.

trantor:~# cxgbetool t5nex0 modinfo 1
ID: SFP
Vendor FINISAR CORP.
SN AJ10JQR
PN FTLX8571D3BCL
Rev A
Temp: +35C
Vcc 3.225600V
TX Bias 2.176000uA
TX Power 0.588800mW
RX Power 0.486400mW

r259048:
Two new cxgbetool subcommands to set up scheduler classes and to bind
them to NIC queues.

r261534:
cxgbetool: Display the congestion channel map in hex.

git-svn-id: svn://svn.freebsd.org/base/stable/9@265589 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f