process system header same way as any other header file. Required for compiling with clang 3.3 on FreeBSD 10
Remove unused private field
do not init _keepalive field, it was not used and deleted
remove extra parenthesses

Original patch from Radim Kolar.
remove unused private _eventloop variable
redefine RoutingSocketPlumber as class

Original patch from Radom Kolar.
fea/rib/rtrmgr: Remove un-used class members.

Original patch series by Radim Kolar.

Signed-off-by: Ben Greear <greearb@candelatech.com>