Log Message:
Changes in 3.9.1 since 3.9.0:

Utilities/Sphinx: Restore compatibility with Sphinx pre-1.2
Help: Silence warning about document not included in toctree
UseSWIG: Fix when Java is enabled as a language
VS: Fix VCTargetsPath detection
Android: Fix support for CMAKE_SYSROOT without CMAKE_SYSROOT_COMPILE
expat: Update script to get Expat 2.2.3
expat: Update CMake build for 2.2.3
Tests: Simplify RunCMake.find_package PackageRoot case regexes
find_*: Disable the PACKAGE_ROOT search path group for CMake 3.9
find_package: Add missing PACKAGE_ROOT_PATH search path implementation.
find_package: Fix PACKAGE_ROOT test to check find_pacakge(CONFIG) mode.
find_package: Split PACKAGE_ROOT tests to work with smaller regex
FindJava: Allow early access version trailing string to be mixed case
FindBoost: pop policy stack before returning
expat 2017-08-02 (97c6bd01)
server: Fix crash on missing cache entries
FindJava: fix hint for windows jre 1.6
Help: Fix module and function names in CMP0069 examples
Autogen: Always create AUTOMOC/AUTOUIC include directory