Add default parameters to the right ConnectionContext.https (#2610)

CONTRIBUTING.md

@@ -153,7 +153,7 @@ Situations when it may be fine to ignore a MiMa issued warning include:
 - if it is touching any class marked with the `@InternalApi`, `@DoNotInherit`, and `@ApiMayChange`. See [API stability annotations and comments](https://doc.akka.io/docs/akka/current/common/binary-compatibility-rules.html#api-stability-annotations-and-comments)
 - other tricky situations
 
-If it turns out that the change can be safely ignored, please add the filter to the submodule's `src/main/mima-filters/<last-released-version>.backwards.excludes` file using (or creating) the file corresponding to the latest released version.
+If it turns out that the change can be safely ignored, please add the filter to a file with the issue number in the filename, placed in the submodule's `src/main/mima-filters/<last-released-version>.backwards.excludes` directory.
 
 You can run `mimaReportBinaryIssues` on the sbt console to check if you introduced a binary incompatibility or whether an
 incompatibility has been successfully ignored after adding it to the filter file.

akka-http-core/src/main/mima-filters/10.1.9.backwards.excludes/issue-2605-deprecate-right-method.excludes

@@ -0,0 +1,4 @@
+# https://github.com/akka/akka-http/issues/2605
+# This is the static forwarder on the interface, we are manually
+# adding the method on the object which is still used.
+ProblemFilters.exclude[DirectMissingMethodProblem]("akka.http.scaladsl.ConnectionContext.https$default$7")

akka-http-core/src/main/scala/akka/http/scaladsl/ConnectionContext.scala

@@ -24,27 +24,31 @@ trait ConnectionContext extends akka.http.javadsl.ConnectionContext {
 
 object ConnectionContext {
   // ConnectionContext
-  @deprecated("This method is planned to disappear in 10.2.0", "10.1.9")
+  //#https-context-creation
   def https(
     sslContext:          SSLContext,
     sslConfig:           Option[AkkaSSLConfig]         = None,
     enabledCipherSuites: Option[immutable.Seq[String]] = None,
     enabledProtocols:    Option[immutable.Seq[String]] = None,
     clientAuth:          Option[TLSClientAuth]         = None,
-    sslParameters:       Option[SSLParameters]         = None,
-    http2:               UseHttp2                      = UseHttp2.Negotiated) =
+    sslParameters:       Option[SSLParameters]         = None) =
     new HttpsConnectionContext(sslContext, sslConfig, enabledCipherSuites, enabledProtocols, clientAuth, sslParameters)
-
   //#https-context-creation
+
+  @deprecated("This method is planned to disappear in 10.2.0", "10.1.9")
   def https(
     sslContext:          SSLContext,
     sslConfig:           Option[AkkaSSLConfig],
     enabledCipherSuites: Option[immutable.Seq[String]],
     enabledProtocols:    Option[immutable.Seq[String]],
     clientAuth:          Option[TLSClientAuth],
-    sslParameters:       Option[SSLParameters]) =
+    sslParameters:       Option[SSLParameters],
+    http2:               UseHttp2) =
     new HttpsConnectionContext(sslContext, sslConfig, enabledCipherSuites, enabledProtocols, clientAuth, sslParameters)
-  //#https-context-creation
+
+  // for bincompat
+  @deprecated("This method is planned to disappear in 10.2.0", "10.1.9")
+  private[scaladsl] def https$default$7(): akka.http.scaladsl.UseHttp2 = UseHttp2.Negotiated
 
   @deprecated("for binary-compatibility", "2.4.7")
   def https(