CMake Nightly Date Stamp
FindBoost: Clarify failure on missing 'static' libs (#14235)

When Boost_USE_STATIC_LIBS is ON we may complain that Boost libraries
cannot be found even when shared libraries are present.  Update the
error message to tell the user explicitly that we want static libraries.

Suggested-by: Laurence R. McGlashan <laurence.mcglashan@gmail.com>
Merge topic 'FindBoost-error-reason-static' into next

86cbd73 FindBoost: Clarify failure on missing 'static' libs (#14235)
7c61c73 CMake Nightly Date Stamp