Leave the server SCP code out of client builds

A client-only library still built and exported wolfSSH_SCP_accept().
The server SCP entry points now sit under NO_WOLFSSH_SERVER, the way
the client ones already sit under NO_WOLFSSH_CLIENT.

- guard wolfSSH_SCP_accept(), DoScpRequest() and ParseScpCommand()
- guard the DoScpRequest() and ParseScpCommand() prototypes in
  internal.h

src/wolfscp.c

@@ -894,6 +894,7 @@ int DoScpSource(WOLFSSH* ssh)
     return ret;
 }
 
+#ifndef NO_WOLFSSH_SERVER
 /* Contract is in wolfssh/wolfscp.h. */
 int wolfSSH_SCP_accept(WOLFSSH* ssh)
 {
@@ -999,6 +1000,7 @@ int DoScpRequest(WOLFSSH* ssh)
 
     return ret;
 }
+#endif /* !NO_WOLFSSH_SERVER */
 
 /* Sets the error message that is sent back to the peer when an error or fatal
  * confirmation message is sent. Expected to be used inside the scp
@@ -1623,6 +1625,7 @@ static int ParseBasePathHelper(WOLFSSH* ssh)
     return ret;
 }*/
 
+#ifndef NO_WOLFSSH_SERVER
 /* Parse scp command received, currently only looks for and stores the
  * SCP base path being written to.
  *
@@ -1742,6 +1745,7 @@ int ParseScpCommand(WOLFSSH* ssh)
 
     return ret;
 }
+#endif /* !NO_WOLFSSH_SERVER */
 
 /* Reads and parses SCP protocol control messages
  *
@@ -2228,7 +2232,7 @@ int wolfSSH_SCP_from(WOLFSSH* ssh, const char* src, const char* dst)
 
     return ret;
 }
-#endif /* ! NO_WOLFSSH_CLIENT */
+#endif /* !NO_WOLFSSH_CLIENT */
 
 
 #if !defined(WOLFSSH_SCP_USER_CALLBACKS)

wolfssh/internal.h

@@ -2361,10 +2361,12 @@ enum WS_ScpDirection {
     WOLFSSH_SCP_FROM
 };
 
+#ifndef NO_WOLFSSH_SERVER
 WOLFSSH_LOCAL int DoScpRequest(WOLFSSH* ssh);
+WOLFSSH_LOCAL int ParseScpCommand(WOLFSSH* ssh);
+#endif /* !NO_WOLFSSH_SERVER */
 WOLFSSH_LOCAL int DoScpSink(WOLFSSH* ssh);
 WOLFSSH_LOCAL int DoScpSource(WOLFSSH* ssh);
-WOLFSSH_LOCAL int ParseScpCommand(WOLFSSH* ssh);
 WOLFSSH_LOCAL int ReceiveScpMessage(WOLFSSH* ssh);
 WOLFSSH_LOCAL int ReceiveScpFile(WOLFSSH* ssh);
 WOLFSSH_LOCAL int SendScpConfirmation(WOLFSSH* ssh);