Added "threads" argument to Invite argument parser

Author: rlvilla

src/sippts/lib/params.py

@@ -2258,6 +2258,14 @@ def get_sippts_args():
         dest="transfer_number",
         default="",
     )
+    other.add_argument(
+        "-th",
+        metavar="THREADS",
+        type=int,
+        help="Number of threads (default: 200)",
+        dest="threads",
+        default=200,
+    )
     other.add_argument(
         "-local-ip",
         metavar="IP",