reload.txt update

- Added copyrights and IETF license.
- Updates for draft-ietf-p2psip-base-24.
- Updates for draft-ietf-p2psip-ddr-03.
- Updates for draft-ietf-p2psip-diagnostics-09.
- Updates for draft-ietf-p2psip-service-discovery-06.
- Updates for draft-ietf-p2psip-sip-08.
- Added definitions for draft-ietf-p2psip-share-00.
- Added definitions for draft-ietf-p2psip-disco-00.