fix: Modify the default repeat value from 3 to 2

Author: MikeWang000000

src/globvar.c

@@ -39,7 +39,7 @@ struct fh_context g_ctx = {.exit = 0,
                            /* -k */ .killproc = 0,
                            /* -m */ .fwmark = 0x8000,
                            /* -n */ .nfqnum = 512,
-                           /* -r */ .repeat = 3,
+                           /* -r */ .repeat = 2,
                            /* -s */ .silent = 0,
                            /* -t */ .ttl = 3,
                            /* -w */ .logpath = NULL,