http: mutable request fields

examples/fetch.v

@@ -0,0 +1,13 @@
+import time
+import net.http
+
+fn main() {
+  resp := http.get('https://vlang.io/utc_now') or {
+    println('failed to fetch data from the server')
+    return
+  }
+
+  t := time.unix(resp.text.int())
+  println(t.format())
+}
+

vlib/net/http/http.v

@@ -12,7 +12,7 @@ const (
 )
 
 pub struct Request {
-pub:
+pub mut:
 	method     string
 	headers    map[string]string
 	cookies    map[string]string