Added note about possibility of capping the cookie expiry value (#944)

Author: whimboo

index.bs

@@ -49,6 +49,7 @@ spec: RFC6265
     text: Cookie store; url: https://httpwg.org/specs/rfc6265.html#storage-model
 spec: RFC6265bis; urlPrefix: https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-rfc6265bis-20.html
   type: dfn
+    text: Cookie Lifetime Limits; url: #cookie-lifetime-limits
     text: Lax; url: section-4.1.2.7
     text: Strict; url: section-4.1.2.7
     text: Default; url: section-5.6.7.2
@@ -12334,6 +12335,8 @@ The [=remote end steps=] with <var ignore>session</var> and |command parameters|
    <dd><p>|cookie spec|["<code>expiry</code>"] if it exists, otherwise leave unset to
     indicate that this is a session cookie.
 
+    Note: The cookie's expiry value might be limited by the remote end in accordance with the [=Cookie Lifetime Limits=].
+
    <dt>[=Cookie same site=]
    <dd><p>|cookie spec|["<code>sameSite</code>"] if it exists, otherwise leave unset to
     indicate that no same site policy is defined.