ListenAndServeをCTRL+Cで止める

signal.NotityとGoroutineを使います。

package main

import (
    "net/http"
    "os"
    "os/signal"
)

func handler(w http.ResponseWriter, r *http.Request) {
}

func main() {
    ch := make(chan os.Signal, 1)
    signal.Notify(ch, os.Interrupt)

    go func() {
        for _ = range ch {
            signal.Stop(ch)
            os.Exit(0)
        }
    }()

    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}