Commits
Merge pull request #1784 in HDFFV/hdf5 from ~KOZIOL/hdf5:feature/update_gcc_flags to develop * commit '6ced6457c3048bd10bf6f470b329b4810d9be826': Move the -Wformat-nonliteral warning to the developer flags. Fix bugs I introduced in the last commit. Updated configure & CMake compiler flags for GCC 8.x, along with corresponding changes to warnhist script (and some extra improvements for condensing C++ and Java warnings), and fixed a bunch of warnings.
