emit old, compatible API version number when Enigmail-2.0-compat mode is set

server/server_version.cc

@@ -67,7 +67,12 @@ static const std::string VersionName =
 //const ServerVersion sv(0,14,0);  // JSON-75: incompatible behavior of daemonize() especially in MS Windows
 //const ServerVersion sv(0,15,0);  // JSON-92: API CHANGE.
 //const ServerVersion sv(0,15,1);  // JSON-92 again: Change "keylist" in (MIME_)decrypt_message() from Out to InOutP. Is a compatible API change for JSON/JavaScript due to the handling of output parameters. :-)
+
+#ifdef ENIGMAIL_2_0_COMPAT
+const ServerVersion sv(0,14,1); // JSON-97 : make MIME_decrypt_message() API-compatible with pre-JSON-92's changes for Enigmail 2.0
+#else
 const ServerVersion sv(0,15,2);  // JSON-93 InLength<> is a compatible API change, because length parameter is still there but ignored. :-)
+#endif // ENIGMAIL_2_0_COMPAT
 
 } // end of anonymous namespace
 ////////////////////////////////////////////////////////////////////////////