Bring 3 small changes from Hdf5 1.8 to 1.8.22 (#241)

* Restores maintainer mode in the autotools (#200)

Maintainer mode should be enabled in development branches.

Also adds helpful commenting.

Add bin/switch_maint_mode
Disable maintainer mode for release.
Fix incomplete merge for stub functions in H5Fdhdfs.c

* Update configure for Restores maintainer mode in the autotools (#200).

* Update MANIFEST for switch_maint_mode script.

* Update so numbers for 1.8.22 release.

* Add so numbers changes in Makefile.ins for 1.8.22 release.

* Update pkgconfig settings with version - #218 (#223)

* Add notice of final HDFF5 1.8 release.
Add solaris 64bit alignment issue to "Known Problems".

* Update 1.8 final release notice.

* Update CMake/HDF5Examples version in bin/release

* Fixed typo in an error message. (#227)

* Remove duplicate setting (#239)

Co-authored-by: Dana Robinson <[email protected]>
Co-authored-by: Allen Byrne <[email protected]>
Co-authored-by: bmribler <[email protected]>

config/cmake/HDF5PluginCache.cmake

@@ -8,7 +8,6 @@
 set (H5PL_BUILD_TESTING ON CACHE BOOL "Enable h5pl testing" FORCE)
 set (BUILD_EXAMPLES ON CACHE BOOL "Build h5pl Examples" FORCE)
 
-set (HDF5_PACKAGE_NAME "hdf5" CACHE STRING "Name of HDF5 package" FORCE)
 set (HDF5_HDF5_HEADER "h5pubconf.h" CACHE STRING "Name of HDF5 header" FORCE)
 set (HDF5_LINK_LIBS ${HDF5_LIBSH_TARGET} CACHE STRING "hdf5 target" FORCE)
 #set (HDF5_INCLUDE_DIR $<TARGET_PROPERTY:${HDF5_LIBSH_TARGET},INCLUDE_DIRECTORIES> CACHE PATH "hdf5 include dirs" FORCE)