simplified library and added better examples and net.UnixListener support

example/main.go

@@ -1,31 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"net"
-	"net/http"
-	"os"
-
-	"git.giftfish.de/ston1th/godrop"
-)
-
-func main() {
-	cfg := godrop.Config{
-		User:  "nobody",
-		Group: "nobody",
-	}
-	err := godrop.Drop(cfg, func() (net.Listener, error) { return net.Listen("tcp", ":80") })
-	if err != nil {
-		fmt.Println(err)
-	}
-
-	l, err := godrop.GetListener()
-	if err != nil {
-		fmt.Println("Failed to listen on FD 3:", err)
-		os.Exit(1)
-	}
-
-	http.Serve(l, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		fmt.Fprintf(w, "pid %d\nuid %d\ngid %d", os.Getpid(), os.Getuid(), os.Getgid())
-	}))
-}