v1.21.1
[init] Show startup and shutdown function names in debug messages
[legal] Relicense files under GPL2_OR_LATER_OR_UBDL
[legal] Update FSF mailing address in GPL licence texts
[linux] Provide access to SMBIOS via /dev/mem
[time] Allow timer to be selected at runtime
[linux] Rewrite headers included in all builds
[linux] Make malloc and linux_umalloc valgrindable