PostgreSQL License Question

Hello,
I see on your website that PostgreSQL is released under an Open Source license.
Do you consider addendums proposed by your users, modifying the posted license terms?
Thank you.
From your website:
PostgreSQL is released under the PostgreSQL License<https://urldefense.com/v3/__https:/www.opensource.org/licenses/postgresql__;!!LAlM4g!ilTFCBLmWeCcHFgyYw1iwH_9ELPG3QxpJBsbWgvL0rQtS4Kkfgv0fLuOZCAevyCwfZM$>, a liberal Open Source license, similar to the BSD or MIT licenses.

Kristi Kangas
Procurement and Support Services
312-653-5503

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