2.53.1 contains bugfixes and improvements.
- Repeat mode is more fault tolerant, recovering after temporary
errors. - Preferences "force", "prefer" and related no longer require
specifying the full root. - Improve stopping of update propagation.
- Enable VT input escape codes in Windows.
- Respect user-provided CFLAGS, CPPFLAGS, LDFLAGS, LDLIBS.
- Add build instructions in INSTALL.md (and drop from manual).
- Add graceful stop in repeat mode - SIGUSR2.
- Add watch+seconds to 'repeat' preference.