v5.2.11
tuklib_physmem: Silence warning from -Wcast-function-type on MinGW-w64.
Bump version and soname for 5.2.11.
Build: Prepare to support Automake's subdir-objects.
Scripts: Ignore warnings from xz.
Change a few HTTP URLs to HTTPS.
Build: Add support for translated man pages using po4a.