Moved net plugin to its own directory

Makefile

@@ -83,7 +83,7 @@ $(NETCHECK_EXE): prog/netcheck/netcheck.go
 $(SIGPROXY_EXE): prog/sigproxy/main.go
 $(WEAVEWAIT_EXE): prog/weavewait/*.go net/*.go
 $(DOCKERTLSARGS_EXE): prog/docker_tls_args/*.go
-$(DOCKERPLUGIN_EXE): prog/plugin/*.go plugin/*.go plugin/skel/*.go api/*.go common/docker/*.go
+$(DOCKERPLUGIN_EXE): prog/plugin/*.go plugin/net/*.go plugin/skel/*.go api/*.go common/docker/*.go
 $(TEST_TLS_EXE): test/tls/*.go
 
 $(WEAVEWAIT_EXE) $(SIGPROXY_EXE) $(DOCKERTLSARGS_EXE) $(DOCKERPLUGIN_EXE) $(TEST_TLS_EXE):

prog/plugin/main.go

@@ -9,7 +9,7 @@ import (
 	"syscall"
 
 	. "github.com/weaveworks/weave/common"
-	"github.com/weaveworks/weave/plugin"
+	"github.com/weaveworks/weave/plugin/net"
 	"github.com/weaveworks/weave/plugin/skel"
 )