* ChangeLog: Relicense under GPL.
* ChangeLog.0: Likewise.
* ChangeLog.1: Likewise.
* ChangeLog.2: Likewise.
* THANKS: Likewise.
* m4/m4.m4: Use latest wording of FSF all-permissive license.
* m4/make-case.m4: Likewise.
* doc/install.texi: Likewise.
* tests/statesave.m4: Relicense to match rest of testsuite; this
file does not need all-permissive license since it is not designed
for reuse by other packages.
* BUGS: Relicense under all-permissive license.
* HACKING: Likewise.
* NEWS: Likewise.
* README: Likewise.
* README-alpha: Likewise.
* README-hacking: Likewise.
* TODO: Likewise.

Signed-off-by: Eric Blake <ebb9@byu.net>