Deprecate OCC checking

Deprecate OCC checking

- Move OCC warnings to debug level. This moves the only useful OCC message
  of compress-migrate to D_PUSH
- remove configure option --enable-strict-options
- ignore disable-occ in TLS mode as it is logged under debug now only
  disable-occ is now strictly a non-TLS option
- mark opt-verify and disable-occ as deprecated.

Patch v2: change one missed M_WARN to D_OCC

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20230111134439.1107915-1-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg25970.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>