Config: Make defaults consistent with mihomo (#931)

Author: arkxfly

clash-lib/src/config/internal/listener.rs

@@ -16,19 +16,22 @@ pub enum InboundOpts {
     Socks {
         #[serde(flatten)]
         common_opts: CommonInboundOpts,
+        #[serde(default = "default_bool_true")]
         udp: bool,
     },
     #[serde(alias = "mixed")]
     Mixed {
         #[serde(flatten)]
         common_opts: CommonInboundOpts,
+        #[serde(default = "default_bool_true")]
         udp: bool, // TODO users
     },
     #[cfg(feature = "tproxy")]
     #[serde(alias = "tproxy")]
     TProxy {
         #[serde(flatten)]
         common_opts: CommonInboundOpts,
+        #[serde(default = "default_bool_true")]
         udp: bool,
     },
     #[cfg(feature = "redir")]