update docs

Author: dwrensha

capnp-rpc/README.md

@@ -83,7 +83,8 @@ To create an RPC-enabled object, you must implement that trait.
 struct MyBar {}
 
 impl ::foo_capnp::bar::Server for MyBar {
-     async fn baz(&self,
+     async fn baz(
+            self: Rc<Self>,
             params: ::foo_capnp::bar::BazParams,
             mut results: ::foo_capnp::bar::BazResults)
         -> Result<(), ::capnp::Error>
@@ -123,7 +124,8 @@ Here's an example of a method implementation that does not return immediately:
 struct MyQux {}
 
 impl ::foo_capnp::qux::Server for MyQux {
-     async fn quux(&mut self,
+     async fn quux(
+             self: Rc<Self>,
              params: ::foo_capnp::qux::QuuxParams,
              mut results: ::foo_capnp::wux::QuuxResults)
         -> Result<(), ::capnp::Error>

capnp-rpc/src/lib.rs

@@ -34,7 +34,8 @@
 //! // Rust server defining an implementation of Foo.
 //! struct FooImpl;
 //! impl foo::Server for FooImpl {
-//!     async fn identity(&self,
+//!     async fn identity(
+//!         self: Rc<Self>,
 //!         params: foo::IdentityParams,
 //!         mut results: foo::IdentityResults
 //!     ) -> Result<(), ::capnp::Error> {