XkbSetBounceKeysDelay is documented but does not exist

Moved here from Red Hat Bugzilla:

Description of problem:
While trying to do something about a remote control where the keys are generating bounces, aunt
Google pointed me to the XkbSetBounceKeysDelay function.  I didn't quite understand the man page
for it, but I started out to write a little program to see if I could figure it out.

It turns out that I can't compile and link the program.  The libraries do not include the symbol,
nor is it a #define in any header file I can find.  This seems inconsistent, and I guess it is a
bug somewhere.


Version-Release number of selected component (if applicable):
libX11-1.6.3-3.fc24 (and d:o -devel and -common)


Steps to Reproduce:
1. man XkbSetBounceKeysDelay
2. cc <program referencing XkbSetBounceKeysDelay> -lX11 


Actual results:
The first command returns what appears to be a valid manual page, but the second command fails.


Expected results:
Either the libraries should include the function, or no manual page should be there indicating they do.


Additional info:
If anyone has a better pointer on how to manage a remote control that generates key bounces than Google, I'm all ears! :-)