// the TCP fast open connect. This feature is supported
			// since Linux 4.11.
			_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, unix.TCP_FASTOPEN_CONNECT, 1)

			// Enable TCP quick ACK, John Nagle says
			// "Set TCP_QUICKACK. If you find a case where that makes things worse, let me know."
			_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, unix.TCP_QUICKACK, 1)

			/// Enable keep-alive
			{

Shinsuke Sugaya <******@****.***> 1756627257 +0900

qF,EAAkB,GAItB,IAAKrF,KAAQmF,EACLxJ,EAAWwJ,EAAanF,KACxBoF,EAAiBJ,EAAehF,MAE5BqF,EAAgBD,GAAkBD,EAAYnF,IAK1D,OAAOqF,EAGX,IAAIC,EAAa,GAEjB,SAASC,EAAgBX,EAAMY,GAC3BF,EAAWV,GAAQY,EAiBvB,SAASC,EAAWC,GAChB,OAAQA,EAAO,GAAM,GAAKA,EAAO,KAAQ,GAAMA,EAAO,KAAQ,EAGlE,SAASC,EAASnD,GACd,OAAIA,EAAS,EAEFI,KAAKgD,KAAKpD,IAAW,EAErBI,KAAKiD,MAAMrD,GAI1B,SAASsD,EAAMC,GACX,IAAIC,GAAiBD,EACjBE,EAAQ,EAMZ,OAJsB,GAAlBD,GAAuBE,SAASF,KAChCC,EAAQN,EAASK,IAGdC,EAGX,SAASE,EAAWvB,EAAMwB,GACtB,OAAO,SAAUH,GACb,OAAa,MAATA,GACAI,EAA...

// https://www.iana.org/domains/root/db/xn--1qqw23a.html
佛山

// xn--30rr7y : Excellent First Limited
// https://www.iana.org/domains/root/db/xn--30rr7y.html
慈善

// xn--3bst00m : Eagle Horizon Limited
// https://www.iana.org/domains/root/db/xn--3bst00m.html
集团

// xn--3ds443g : TLD REGISTRY LIMITED OY
// https://www.iana.org/domains/root/db/xn--3ds443g.html
在线