Update Linux manpage links to kernel.org

Author: grynspan

Sources/Testing/ExitTests/ExitTest.Condition.swift

@@ -105,7 +105,7 @@ extension ExitTest.Condition {
   /// | Platform | Header |
   /// |-|-|
   /// | macOS | [`<stdlib.h>`](https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/_Exit.3.html), [`<sysexits.h>`](https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/sysexits.3.html) |
-  /// | Linux | [`<stdlib.h>`](https://sourceware.org/glibc/manual/latest/html_node/Exit-Status.html), `<sysexits.h>` |
+  /// | Linux | [`<stdlib.h>`](https://www.kernel.org/doc/man-pages/online/pages/man3/exit.3.html), [`<sysexits.h>`](https://www.kernel.org/doc/man-pages/online/pages/man3/sysexits.h.3head.html) |
   /// | FreeBSD | [`<stdlib.h>`](https://man.freebsd.org/cgi/man.cgi?exit(3)), [`<sysexits.h>`](https://man.freebsd.org/cgi/man.cgi?sysexits(3)) |
   /// | OpenBSD | [`<stdlib.h>`](https://man.openbsd.org/exit.3), [`<sysexits.h>`](https://man.openbsd.org/sysexits.3) |
   /// | Windows | [`<stdlib.h>`](https://learn.microsoft.com/en-us/cpp/c-runtime-library/exit-success-exit-failure) |
@@ -143,7 +143,7 @@ extension ExitTest.Condition {
   /// | Platform | Header |
   /// |-|-|
   /// | macOS | [`<signal.h>`](https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/signal.3.html) |
-  /// | Linux | [`<signal.h>`](https://sourceware.org/glibc/manual/latest/html_node/Standard-Signals.html) |
+  /// | Linux | [`<signal.h>`](https://www.kernel.org/doc/man-pages/online/pages/man7/signal.7.html) |
   /// | FreeBSD | [`<signal.h>`](https://man.freebsd.org/cgi/man.cgi?signal(3)) |
   /// | OpenBSD | [`<signal.h>`](https://man.openbsd.org/signal.3) |
   /// | Windows | [`<signal.h>`](https://learn.microsoft.com/en-us/cpp/c-runtime-library/signal-constants) |

Sources/Testing/ExitTests/StatusAtExit.swift

@@ -38,7 +38,7 @@ public enum StatusAtExit: Sendable {
   /// | Platform | Header |
   /// |-|-|
   /// | macOS | [`<stdlib.h>`](https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/_Exit.3.html), [`<sysexits.h>`](https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/sysexits.3.html) |
-  /// | Linux | [`<stdlib.h>`](https://sourceware.org/glibc/manual/latest/html_node/Exit-Status.html), `<sysexits.h>` |
+  /// | Linux | [`<stdlib.h>`](https://www.kernel.org/doc/man-pages/online/pages/man3/exit.3.html), [`<sysexits.h>`](https://www.kernel.org/doc/man-pages/online/pages/man3/sysexits.h.3head.html) |
   /// | FreeBSD | [`<stdlib.h>`](https://man.freebsd.org/cgi/man.cgi?exit(3)), [`<sysexits.h>`](https://man.freebsd.org/cgi/man.cgi?sysexits(3)) |
   /// | OpenBSD | [`<stdlib.h>`](https://man.openbsd.org/exit.3), [`<sysexits.h>`](https://man.openbsd.org/sysexits.3) |
   /// | Windows | [`<stdlib.h>`](https://learn.microsoft.com/en-us/cpp/c-runtime-library/exit-success-exit-failure) |
@@ -69,7 +69,7 @@ public enum StatusAtExit: Sendable {
   /// | Platform | Header |
   /// |-|-|
   /// | macOS | [`<signal.h>`](https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/signal.3.html) |
-  /// | Linux | [`<signal.h>`](https://sourceware.org/glibc/manual/latest/html_node/Standard-Signals.html) |
+  /// | Linux | [`<signal.h>`](https://www.kernel.org/doc/man-pages/online/pages/man7/signal.7.html) |
   /// | FreeBSD | [`<signal.h>`](https://man.freebsd.org/cgi/man.cgi?signal(3)) |
   /// | OpenBSD | [`<signal.h>`](https://man.openbsd.org/signal.3) |
   /// | Windows | [`<signal.h>`](https://learn.microsoft.com/en-us/cpp/c-runtime-library/signal-constants) |