New license: Stalwart Enterprise License 1.0 (SELv1)

[armijnhemel]

Description

https://github.com/stalwartlabs/mail-server/blob/main/LICENSES/LicenseRef-SEL.txt

[DennisClark]

New license LicenseRef-scancode-selv1 created in DejaCode enterprise and public. Commercial. Note that Stalwart makes its mail-server application available under a choice of agpl-3.0 or this "Stalwart Enterprise License 1.0 (SELv1) Agreement".

@AyanSinhaMahapatra Please synchronize when you have time, thanks.

[AyanSinhaMahapatra]

Added in #4278, added also to licensedb and license-expression v30.4.4 , closing.