REORG: use the name sock_raw instead of stream_sock

We'll soon have an SSL socket layer, and in order to ease the difference
between the two, we use the name "sock_raw" to designate the one which
directly talks to the sockets without any conversion.
diff --git a/Makefile b/Makefile
index 8a96dd7..a6c7962 100644
--- a/Makefile
+++ b/Makefile
@@ -512,7 +512,7 @@
        src/time.o src/fd.o src/pipe.o src/regex.o src/cfgparse.o src/server.o \
        src/checks.o src/queue.o src/frontend.o src/proxy.o src/peers.o \
        src/arg.o src/stick_table.o src/proto_uxst.o \
-       src/proto_http.o src/stream_sock.o src/appsession.o src/backend.o \
+       src/proto_http.o src/sock_raw.o src/appsession.o src/backend.o \
        src/lb_chash.o src/lb_fwlc.o src/lb_fwrr.o src/lb_map.o src/lb_fas.o \
        src/stream_interface.o src/dumpstats.o src/proto_tcp.o \
        src/session.o src/hdr_idx.o src/ev_select.o src/signal.o \