build: upgrade to go 1.17 and dependencies

vendor/golang.org/x/sys/unix/syscall_darwin.go

@@ -49,11 +49,6 @@ type SockaddrDatalink struct {
 	raw    RawSockaddrDatalink
 }
 
-// Some external packages rely on SYS___SYSCTL being defined to implement their
-// own sysctl wrappers. Provide it here, even though direct syscalls are no
-// longer supported on darwin.
-const SYS___SYSCTL = 202
-
 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
 func nametomib(name string) (mib []_C_int, err error) {
 	const siz = unsafe.Sizeof(mib[0])
@@ -428,7 +423,6 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
 //sysnb	Getrlimit(which int, lim *Rlimit) (err error)
 //sysnb	Getrusage(who int, rusage *Rusage) (err error)
 //sysnb	Getsid(pid int) (sid int, err error)
-//sysnb	Gettimeofday(tp *Timeval) (err error)
 //sysnb	Getuid() (uid int)
 //sysnb	Issetugid() (tainted bool)
 //sys	Kqueue() (fd int, err error)