add terminal workaround to rstudio1.md

rstudio1.md

@@ -5,6 +5,8 @@
 1. use your iDiv username and password to login
 1. please remember to end your session when you have finished your current calculations (red button upper right)
 
+### terminal in Web-IDE of RStudio
+The default setting requires websockets to work, which currently do not. Uncheck *Connect with WebSockets* in *Tools->Global Options->Terminal* and your terminal should work.
 
 ## ssh access
 You can only reach the server from the internal network, i.e. if you are connected via VPN or cable at iDiv. Note that the internal name is rstudio1 instead of rstudio!