-Put the optimized soreceive_stream() under a compile time option called

TCP_SORECEIVE_STREAM for the time being.

Requested by:	brooks

Once compiled in make it easily switchable for testers by using a tuneable
 net.inet.tcp.soreceive_stream
and a corresponding read-only sysctl to report the current state.

Suggested by:	rwatson

MFC after:	2 days
-This line, and those below, will be ignored--
> Description of fields to fill in above:                     76 columns --|
> PR:            If a GNATS PR is affected by the change.
> Submitted by:  If someone else sent in the change.
> Reviewed by:   If someone else reviewed your modification.
> Approved by:   If you needed approval for this commit.
> Obtained from: If the change is from a third party.
> MFC after:     N [day[s]|week[s]|month[s]].  Request a reminder email.
> Security:      Vulnerability reference (one per line) or description.
> Empty fields above will be automatically removed.

M    sys/conf/options
M    sys/kern/uipc_socket.c
M    sys/netinet/tcp_subr.c
M    sys/netinet/tcp_usrreq.c

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/conf/options b/sys/conf/options
index 2c2344b..4752fb8 100644
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -416,6 +416,7 @@ SLIP_IFF_OPTS		opt_slip.h
 TCPDEBUG
 TCP_OFFLOAD_DISABLE	opt_inet.h #Disable code to dispatch tcp offloading
 TCP_SIGNATURE		opt_inet.h
+TCP_SORECEIVE_STREAM	opt_inet.h
 VLAN_ARRAY		opt_vlan.h
 XBONEHACK
 FLOWTABLE		opt_route.h