Use configured mail from

src/bin/archversion

@@ -173,7 +173,8 @@ def command_sendmail(args, vctrl):
     # check args
     try:
         to = config["mail"]["to"]
-        subject = config["mail"]["subject"]
+        from_ = config["mail"].get("from", "Archversion <noreply@archlinux.org>")
+        subject = config["mail"].get("subject", "Archversion Report")
         smtp = config["smtp"]["host"]
     except KeyError as exp:
         logging.error("Invalid sendmail config: %s" % exp)
@@ -190,7 +191,7 @@ def command_sendmail(args, vctrl):
     # format the mail
     msg = MIMEText(stdout.getvalue())
     msg["Subject"] = subject
-    msg["From"] = "Archversion <version@archlinux.org>"
+    msg["From"] = from_
     msg["To"] = to
     msg["Date"] = formatdate(localtime=True)
     # send the mail