Add TCP_FASTOPEN_CONNECT for Linux after 4.11

fix #1633

Author: zonyitoo

src/unix/linux_like/emscripten/mod.rs

@@ -1227,6 +1227,7 @@ pub const TCP_QUEUE_SEQ: ::c_int = 21;
 pub const TCP_REPAIR_OPTIONS: ::c_int = 22;
 pub const TCP_FASTOPEN: ::c_int = 23;
 pub const TCP_TIMESTAMP: ::c_int = 24;
+pub const TCP_FASTOPEN_CONNECT: ::c_int = 30;
 
 #[doc(hidden)]
 #[deprecated(since = "0.2.55", note = "Use SIGSYS instead")]

src/unix/linux_like/linux/gnu/mod.rs

@@ -410,6 +410,7 @@ pub const TCP_QUEUE_SEQ: ::c_int = 21;
 pub const TCP_REPAIR_OPTIONS: ::c_int = 22;
 pub const TCP_FASTOPEN: ::c_int = 23;
 pub const TCP_TIMESTAMP: ::c_int = 24;
+pub const TCP_FASTOPEN_CONNECT: ::c_int = 30;
 
 /* DCCP socket options */
 pub const DCCP_SOCKOPT_PACKET_SIZE: ::c_int = 1;

src/unix/linux_like/linux/musl/mod.rs

@@ -271,6 +271,7 @@ pub const TCP_QUEUE_SEQ: ::c_int = 21;
 pub const TCP_REPAIR_OPTIONS: ::c_int = 22;
 pub const TCP_FASTOPEN: ::c_int = 23;
 pub const TCP_TIMESTAMP: ::c_int = 24;
+pub const TCP_FASTOPEN_CONNECT: ::c_int = 30;
 
 #[deprecated(since = "0.2.55", note = "Use SIGSYS instead")]
 pub const SIGUNUSED: ::c_int = ::SIGSYS;