show yatwiki version in Server header

Makefile

@@ -9,7 +9,10 @@ SOURCES:=Makefile \
 	cmd $(wildcard cmd/yatwiki-server/*.go) \
 	$(wildcard *.go)
 
-GOFLAGS := -ldflags='-s -w' -gcflags='-trimpath=$(GOPATH)' -asmflags='-trimpath=$(GOPATH)'
+GOFLAGS:=-a \
+	-ldflags "-s -w -X code.ivysaur.me/yatwiki.SERVER_HEADER=YATWiki/$(VERSION)" \
+	-gcflags '-trimpath=$(GOPATH)' \
+	-asmflags '-trimpath=$(GOPATH)'
 
 #
 # Phony targets

WikiServer.go

@@ -14,6 +14,8 @@ import (
 	"time"
 )
 
+var SERVER_HEADER string = "YATWiki/0.0.0-devel"
+
 type WikiServer struct {
 	db      *WikiDB
 	opts    *ServerOptions
@@ -79,7 +81,7 @@ func (this *WikiServer) Close() {
 }
 
 func (this *WikiServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Server", "YATWiki3")
+	w.Header().Set("Server", SERVER_HEADER)
 
 	if len(this.bans) > 0 {
 		remoteIP := RemoteAddrToIPAddress(r.RemoteAddr)