OpenBSD: disable FIND_LIBRARY_USE_LIB64_PATHS

OpenBSD has no multilib paths.
Merge topic 'OpenBSD_no_multilib' into next

956b7190 OpenBSD: disable FIND_LIBRARY_USE_LIB64_PATHS
Remove reference to non-existing test.

The CompileFeatures test was extended instead.
Merge topic 'COMPILE_FEATURES-genex' into next

2e11cbc9 Remove reference to non-existing test.
Features: Add COMPILE_FEATURES generator expression.

Allow setting build properties based on the features available
for a target.  The availability of features is determined at
generate-time by evaluating the link implementation.

Ensure that the <LANG>_STANDARD determined while evaluating
COMPILE_FEATURES in the link implementation is not lower than that
provided by the INTERFACE of the link implementation.  This is
similar to handling of transitive properties such as
POSITION_INDEPENDENT_CODE.
Merge topic 'COMPILE_FEATURES-genex' into next

9b5a1734 Features: Add COMPILE_FEATURES generator expression.
Whitespace.
Merge topic 'COMPILE_FEATURES-genex' into next

83f64d50 Whitespace.
cmMakefile: Add methods for checking availability of a feature.
Features: Add COMPILE_FEATURES generator expression.

Allow setting build properties based on the features available
for a target.  The availability of features is determined at
generate-time by evaluating the link implementation.

Ensure that the <LANG>_STANDARD determined while evaluating
COMPILE_FEATURES in the link implementation is not lower than that
provided by the INTERFACE of the link implementation.  This is
similar to handling of transitive properties such as
POSITION_INDEPENDENT_CODE.
Merge topic 'COMPILE_FEATURES-genex' into next

b0555a08 Features: Add COMPILE_FEATURES generator expression.
aa8a6fce cmMakefile: Add methods for checking availability of a feature.
Merge topic 'dev/watch-variable-policy' into next

6a6f2b63 tests: test CMP0054
c0e4340a CMP0054: Remove ALLOWED_UNKNOWN_VARIABLE_READ_ACCESS
tests: set CMP0053 in CMP0054 tests to NEW

Without this, the variable will be expanded twice which will cause
different output due to the watch_variable expansions.
Merge topic 'dev/watch-variable-policy' into next

fee23565 tests: set CMP0053 in CMP0054 tests to NEW
CMake Nightly Date Stamp
Add a test to expose the custom command issue with paths.
Unify all paths that custom command uses to be full paths.
Merge topic 'normalize_custom_command_paths' into next

b67626ac Unify all paths that custom command uses to be full paths.
0efccb2b Add a test to expose the custom command issue with paths.
cmTarget: Add GetFeatureAsBool method

Return the GetFeature method result converted to a boolean value.
cmGeneratorTarget: Improve GetCreateRuleVariable API

Pass the language and configuration to the method so it can return the
complete rule variable name.