core: add legal counsel page

Author: pietroalbini

src/SUMMARY.md

@@ -8,6 +8,7 @@
       - [Moderation](./chat/zulip/moderation.md)
 - [Core](./core/README.md)
     - [Rust Blog Guidelines](./core/blogs.md)
+    - [Legal counsel](./core/legal.md)
 - [Community](./community/README.md)
     - [State of Rust Survey FAQ](./community/survey-faq.md)
 - [Compiler](./compiler/README.md)

src/core/legal.md

@@ -0,0 +1,14 @@
+# Legal counsel
+
+Some of the matters handled by the Rust Project (for example, legal policies or
+DMCA takedowns) require legal counsel to be handled effectively. Mozilla is
+providing legal counsel for such matters, and this page documents how to access
+it.
+
+## How to request counsel
+
+Team members can email Niko Matsakis (`nmatsakis AT mozilla DOT com`) with
+their inquiry, and the request will be forwarded to Mozilla Legal. Due to an
+internal Mozilla policy, team members won't be CCed in the conversation with
+the lawyers, but they will receive a summary of the discussion and the outcome
+after the matter is resolved.