Use portable man pages in comments

Author: xonatius

src/time.rs

@@ -203,7 +203,7 @@ impl std::fmt::Display for ClockId {
 }
 
 /// Get the resolution of the specified clock, (see
-/// [clock_getres(2)](https://www.man7.org/linux/man-pages/man2/clock_getres.2.html)).
+/// [clock_getres(2)](https://pubs.opengroup.org/onlinepubs/7908799/xsh/clock_getres.html)).
 pub fn clock_getres(clock_id: ClockId) -> Result<TimeSpec> {
     let mut c_time: MaybeUninit<libc::timespec> = MaybeUninit::uninit();
     let ret = unsafe { libc::clock_getres(clock_id.as_raw(), c_time.as_mut_ptr()) };
@@ -213,7 +213,7 @@ pub fn clock_getres(clock_id: ClockId) -> Result<TimeSpec> {
 }
 
 /// Get the time of the specified clock, (see
-/// [clock_gettime(2)](https://www.man7.org/linux/man-pages/man2/clock_gettime.2.html)).
+/// [clock_gettime(2)](https://pubs.opengroup.org/onlinepubs/7908799/xsh/clock_gettime.html)).
 pub fn clock_gettime(clock_id: ClockId) -> Result<TimeSpec> {
     let mut c_time: MaybeUninit<libc::timespec> = MaybeUninit::uninit();
     let ret = unsafe { libc::clock_gettime(clock_id.as_raw(), c_time.as_mut_ptr()) };
@@ -223,7 +223,7 @@ pub fn clock_gettime(clock_id: ClockId) -> Result<TimeSpec> {
 }
 
 /// Set the time of the specified clock, (see
-/// [clock_settime(2)](https://www.man7.org/linux/man-pages/man2/clock_settime.2.html)).
+/// [clock_settime(2)](https://pubs.opengroup.org/onlinepubs/7908799/xsh/clock_settime.html)).
 #[cfg(not(any(
     target_os = "macos",
     target_os = "ios",
@@ -238,7 +238,7 @@ pub fn clock_settime(clock_id: ClockId, timespec: TimeSpec) -> Result<()> {
 }
 
 /// Get the clock id of the specified process id, (see
-/// [clock_getcpuclockid(3)](https://www.man7.org/linux/man-pages/man3/clock_getcpuclockid.3.html)).
+/// [clock_getcpuclockid(3)](https://pubs.opengroup.org/onlinepubs/009695399/functions/clock_getcpuclockid.html)).
 #[cfg(any(
     target_os = "freebsd",
     target_os = "dragonfly",