v1.17.1

• Use semantic versioning. (https://semver.org/)
• Fix many compiler warnings with gcc and clang.
• Improve C standards portability and fix the build with -xc++.
• Workaround runtime issues with -Ofast.
• Fix out of tree builds with doxygen support enabled.
• Further improve the build system.
• Update doxygen.
• Remove trailing and redundant whitespace.
• Add dedicated INSTALL and LICENSE files.
• Update the README using the trio homepage. (https://daniel.haxx.se/projects/trio/)
• Add test-build.sh for regression testing.

v1.17

• Fixes typos detected by the 'codespell' program.
• Use a standard autotools build system based from a yacp patch.
• Add a pkgconfig file.
• Fixes a compile failure with -Os.
• Fixes generating the doxygen documentation.
• Merges changes from various downstream patches.