Add :manual-ssl? option to HTTP start-server. (#423)

* Add :ssl? option to HTTP start-server.

Support servers that wish to handle their own SSL setup, in particular SNI.

* Mark project version witg mpp.

* Rename :ssl? to :manual-ssl?

* Change project name back.

Author: scramjet

src/aleph/http.clj

@@ -33,6 +33,7 @@
    | `socket-address` |  a `java.net.SocketAddress` specifying both the port and interface to bind to.
    | `bootstrap-transform` | a function that takes an `io.netty.bootstrap.ServerBootstrap` object, which represents the server, and modifies it.
    | `ssl-context` | an `io.netty.handler.ssl.SslContext` object if an SSL connection is desired |
+   | `manual-ssl?` | set to `true` to indicate that SSL is active, but the caller is managing it (this implies `:ssl-context` is nil). For example, this can be used if you want to use configure SNI (perhaps in `:pipeline-transform`) to select the SSL context based on the client's indicated host name. |
    | `pipeline-transform` | a function that takes an `io.netty.channel.ChannelPipeline` object, which represents a connection, and modifies it.
    | `executor` | a `java.util.concurrent.Executor` which is used to handle individual requests.  To avoid this indirection you may specify `:none`, but in this case extreme care must be taken to avoid blocking operations on the handler's thread.
    | `shutdown-executor?` | if `true`, the executor will be shut down when `.close()` is called on the server, defaults to `true`.

src/aleph/http/server.clj

@@ -447,6 +447,7 @@
            bootstrap-transform
            pipeline-transform
            ssl-context
+           manual-ssl?
            shutdown-executor?
            epoll?
            compression?]
@@ -477,7 +478,7 @@
       (pipeline-builder
         handler
         pipeline-transform
-        (assoc options :executor executor :ssl? (boolean ssl-context)))
+        (assoc options :executor executor :ssl? (or manual-ssl? (boolean ssl-context))))
       ssl-context
       bootstrap-transform
       (when (and shutdown-executor? (instance? ExecutorService executor))