[Rd] Clipboard connections (PR#8668)

[graywh@gmail.com]

Full_Name: Will Gray
Version: R 2.2.1
OS: WinXP SP2
Submission from: (NULL) (160.129.18.69)


I've been using R with a text editor (Tinn-R) and using a feature of the editor
that sends code to a running R session.  Sometimes it is convenient to use the
command "source(file('clipboard'))" to send whole blocks of code.  However, this
quickly fills up the limit of 50 connections, even if 47 are closed.  What does
R hold on to connections it doesn't need, and especially multiple closed
connections to the clipboard?  Should this be changed?