When generating per-config blocks in test and install scripts replace
the form
IF()
# config == A
ENDIF()
IF()
# config == B
ENDIF()
with
IF()
# config == A
ELSEIF()
# config == B
ELSE()
# no config matches
ENDIF()
for clarity and to support the else() case cleanly.
This converts the CMake license to a pure 3-clause OSI-approved BSD
License. We drop the previous license clause requiring modified
versions to be plainly marked. We also update the CMake copyright to
cover the full development time range.
A new cmScriptGenerator base class factors out the non-install-specific
part of cmInstallGenerator. This will be useful for other generators
that want per-configuration functionality.
