feat: import Autocrypt-Gossip keys without checking the addresses

It is safe to import any keys into the keychain.
Keys can anyway be imported from vCards
and Autocrypt headers without any checks.

These checks are from the time before we had key-contacts
and maintained Autocrypt `peerstates` table.

src/mimeparser.rs

@@ -555,8 +555,7 @@ impl MimeMessage {
                 // but only if the mail was correctly signed. Probably it's ok to not require
                 // encryption here, but let's follow the standard.
                 let gossip_headers = mail.headers.get_all_values("Autocrypt-Gossip");
-                gossiped_keys =
-                    parse_gossip_headers(context, &from.addr, &recipients, gossip_headers).await?;
+                gossiped_keys = parse_gossip_headers(context, gossip_headers).await?;
             }
 
             if let Some(inner_from) = inner_from {
@@ -2135,12 +2134,8 @@ fn remove_header(
 /// Parses `Autocrypt-Gossip` headers from the email,
 /// saves the keys into the `public_keys` table,
 /// and returns them in a HashMap<address, public key>.
-///
-/// * `from`: The address which sent the message currently being parsed
 async fn parse_gossip_headers(
     context: &Context,
-    from: &str,
-    recipients: &[SingleInfo],
     gossip_headers: Vec<String>,
 ) -> Result<BTreeMap<String, GossipedKey>> {
     // XXX split the parsing from the modification part
@@ -2155,25 +2150,6 @@ async fn parse_gossip_headers(
             }
         };
 
-        if !recipients
-            .iter()
-            .any(|info| addr_cmp(&info.addr, &header.addr))
-        {
-            warn!(
-                context,
-                "Ignoring gossiped \"{}\" as the address is not in To/Cc list.", &header.addr,
-            );
-            continue;
-        }
-        if addr_cmp(from, &header.addr) {
-            // Non-standard, might not be necessary to have this check here
-            warn!(
-                context,
-                "Ignoring gossiped \"{}\" as it equals the From address", &header.addr,
-            );
-            continue;
-        }
-
         import_public_key(context, &header.public_key)
             .await
             .context("Failed to import Autocrypt-Gossip key")?;