Rebrand to INBUXA: product name, protocol greetings, sign-in page, calendar templates, logos, README

One branding module (types::brand!) supplies the name to every protocol
greeting, the HTTP realm, the startup banner, Received headers, the
user agent, the IMAP ID response and calendar PRODIDs. The sign-in and
calendar pages take ihasmail's palette and font and the INBUXA logo, and
calendar emails embed the INBUXA lockup. Default calendar and address book
names follow. Protocol identifiers (urn:stalwart:jmap, vnd.stalwart Sieve
extensions) and upstream copyright notices are unchanged.

crates/managesieve/src/lib.rs

@@ -9,7 +9,7 @@
 pub mod core;
 pub mod op;
 
-static SERVER_GREETING: &str = "Stalwart ManageSieve at your service.";
+static SERVER_GREETING: &str = concat!(types::brand!(), " ManageSieve at your service.");
 
 #[cfg(test)]
 mod tests {

crates/managesieve/src/op/capability.rs

@@ -14,7 +14,7 @@ impl<T: SessionStream> Session<T> {
         let op_start = Instant::now();
 
         let mut response = Vec::with_capacity(128);
-        response.extend_from_slice(b"\"IMPLEMENTATION\" \"Stalwart ManageSieve\"\r\n");
+        response.extend_from_slice(concat!("\"IMPLEMENTATION\" \"", types::brand!(), " ManageSieve\"\r\n").as_bytes());
         response.extend_from_slice(b"\"VERSION\" \"1.0\"\r\n");
         if !self.stream.is_tls() {
             response.extend_from_slice(b"\"STARTTLS\"\r\n");

crates/managesieve/src/op/logout.rs

@@ -16,6 +16,6 @@ impl<T: AsyncRead + AsyncWrite> Session<T> {
             Elapsed = trc::Value::Duration(0)
         );
 
-        Ok(StatusResponse::ok("Stalwart ManageSieve bids you farewell.").into_bytes())
+        Ok(StatusResponse::ok(concat!(types::brand!(), " ManageSieve bids you farewell.")).into_bytes())
     }
 }