Help: Improve discoverability of CMAKE_FIND_DEBUG_MODE

Help/manual/cmake.1.rst

@@ -242,10 +242,12 @@ Options
  :command:`message(SEND_ERROR)` calls.
 
 ``--debug-find``
- Put cmake find in a debug mode.
+ Put cmake find commands in a debug mode.
 
  Print extra find call information during the cmake run to standard
  error. Output is designed for human consumption and not for parsing.
+ See also the :variable:`CMAKE_FIND_DEBUG_MODE` variable for debugging
+ a more local part of the project.
 
 ``--trace``
  Put cmake in trace mode.