Synchronize with SPDX License List 3.25.0

[DennisClark]

New release of the SPDX License List 3.25.0
See https://github.com/spdx/license-list-XML/releases/tag/v3.25.0

Please update the SCTK files, the LicenseDB, and synchronize with DejaCode.

Note that the SPDX deprecation of the Net-SNMP license in this release might be a complication, and we will probably want to change our SPDX pointer for that license to a Licenseref, but we do not want to deprecate that license in SCTK or DejaCode.

[DennisClark]

@AyanSinhaMahapatra I have completed review and editing of the licenses that were added or updated in DejaCode. A few notes:

• created new owner "Derick Eddington" and assigned to x11-swapped
• decided to leave owner of linking-exception-agpl-3.0 as "Unspecified" since the text is found in many places but there is no indication of an original author of the text