Fix link on IEEE Std 1003.1-2008

Signed-off-by: Vladimir Rutsky <[email protected]>

Author: rutsky

config.md

@@ -154,7 +154,7 @@ For POSIX platforms the `mounts` structure has the following fields:
 * **`cwd`** (string, REQUIRED) is the working directory that will be set for the executable.
     This value MUST be an absolute path.
 * **`env`** (array of strings, OPTIONAL) with the same semantics as [IEEE Std 1003.1-2008's `environ`][ieee-1003.1-2008-xbd-c8.1].
-* **`args`** (array of strings, REQUIRED) with similar semantics to [IEEE Std 1003.1-2008 `execvp`'s *argv*][ieee-1003.1-2008-xsh-exec].
+* **`args`** (array of strings, REQUIRED) with similar semantics to [IEEE Std 1003.1-2008 `execvp`'s *argv*][ieee-1003.1-2008-functions-exec].
     This specification extends the IEEE standard in that at least one entry is REQUIRED, and that entry is used with the same semantics as `execvp`'s *file*.
 
 ### <a name="configPOSIXProcess" />POSIX process
@@ -845,7 +845,7 @@ Here is a full example `config.json` for reference.
 [proc_2]: https://www.kernel.org/doc/Documentation/filesystems/proc.txt
 [semver-v2.0.0]: http://semver.org/spec/v2.0.0.html
 [ieee-1003.1-2008-xbd-c8.1]: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_01
-[ieee-1003.1-2008-xsh-exec]: http://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html
+[ieee-1003.1-2008-functions-exec]: http://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html
 [naming-a-volume]: https://aka.ms/nb3hqb
 
 [capabilities.7]: http://man7.org/linux/man-pages/man7/capabilities.7.html