net: rename files to clarify platform dependency

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6489056

diff --git a/src/pkg/net/dnsconfig.go b/src/pkg/net/dnsconfig_unix.go
similarity index 100%
rename from src/pkg/net/dnsconfig.go
rename to src/pkg/net/dnsconfig_unix.go

diff --git a/src/pkg/net/fd.go b/src/pkg/net/fd_unix.go
similarity index 100%
rename from src/pkg/net/fd.go
rename to src/pkg/net/fd_unix.go

diff --git a/src/pkg/net/file.go b/src/pkg/net/file_unix.go
similarity index 100%
rename from src/pkg/net/file.go
rename to src/pkg/net/file_unix.go

diff --git a/src/pkg/net/doc.go b/src/pkg/net/lookup.go
similarity index 100%
rename from src/pkg/net/doc.go
rename to src/pkg/net/lookup.go

diff --git a/src/pkg/net/multicast_test.go b/src/pkg/net/multicast_posix_test.go
similarity index 100%
rename from src/pkg/net/multicast_test.go
rename to src/pkg/net/multicast_posix_test.go

diff --git a/src/pkg/net/newpollserver.go b/src/pkg/net/newpollserver_unix.go
similarity index 100%
rename from src/pkg/net/newpollserver.go
rename to src/pkg/net/newpollserver_unix.go

diff --git a/src/pkg/net/sock.go b/src/pkg/net/sock_posix.go
similarity index 100%
rename from src/pkg/net/sock.go
rename to src/pkg/net/sock_posix.go

diff --git a/src/pkg/net/sockopt.go b/src/pkg/net/sockopt_posix.go
similarity index 100%
rename from src/pkg/net/sockopt.go
rename to src/pkg/net/sockopt_posix.go

diff --git a/src/pkg/net/sockoptip.go b/src/pkg/net/sockoptip_posix.go
similarity index 100%
rename from src/pkg/net/sockoptip.go
rename to src/pkg/net/sockoptip_posix.go

diff --git a/src/pkg/net/unicast_test.go b/src/pkg/net/unicast_posix_test.go
similarity index 100%
rename from src/pkg/net/unicast_test.go
rename to src/pkg/net/unicast_posix_test.go