4401. [misc] Change LICENSE to MPL 2.0.
[master] use posix-compatible shell in system tests 3839. [test] Use only posix-compatible shell in system tests. [RT #35625]
[master] use test -r in system tests 3806. [test] Improved system test portability. [RT #35625]
update copyright notice
[master] testcrypto.sh in system tests 3714. [test] System tests that need to test for cryptography support before running can now use a common "testcrypto.sh" script to do so. [RT #35213]
reverse bad copyright update
clean first
2981. [func] Partial DNS64 support (AAAA synthesis). [RT #21991]