affects speed of doing 'cvs diff' (in all modes) and 'cvs update' over the
network.
1: don't pause at all unless running in server protocol mode.
2: if running in server protocol mode, do a kludge that intercepts the
stdout and stderr write functions and diverts them to cvs_output() and
cvs_outerr(). Yes, this might be done with fwopen() etc, but that also
requires copying "FILE" structs since you can't freopen stdout etc and
specify functions at the same time.
This HACK will go away once the cvs folks have done their changes to the
library version of gnu diff to use the callbacks as mentioned in the
comments.
8da627698e