build: client_library flag to build only used modules, remove package yaml (#1394)

* move dependencies to library

* remove package.yaml

* remove auto-generated comment

* cleanup target definitions

* add executable options

* add test rtsopts

* revert common options

* don't hide unused packages warning

* Add client_only cabal flag (#1396)

---------

Co-authored-by: IC Rainbow <aenor.realm@gmail.com>
Co-authored-by: Alexander Bondarenko <486682+dpwiz@users.noreply.github.com>

src/Simplex/FileTransfer/Server/Env.hs

@@ -28,7 +28,6 @@ import Simplex.FileTransfer.Transport (VersionRangeXFTP)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Protocol (BasicAuth, RcvPublicAuthKey)
 import Simplex.Messaging.Server.Expiration
-import Simplex.Messaging.Transport (ALPN)
 import Simplex.Messaging.Transport.Server (ServerCredentials (..), TransportServerConfig (..), loadFingerprint, loadServerCredential)
 import Simplex.Messaging.Util (tshow)
 import System.IO (IOMode (..))
@@ -96,9 +95,6 @@ defaultFileExpiration =
       checkInterval = 2 * 3600 -- seconds, 2 hours
     }
 
-supportedXFTPhandshakes :: [ALPN]
-supportedXFTPhandshakes = ["xftp/1"]
-
 newXFTPServerEnv :: XFTPServerConfig -> IO XFTPEnv
 newXFTPServerEnv config@XFTPServerConfig {storeLogFile, fileSizeQuota, xftpCredentials} = do
   random <- C.newRandom