[XFree86] ask for Xvfb

[孙广宇]

hi,all
    I want to build a Xvfb which do not write anything in /tmp. My problem
is the Xvfb I build is 4M large, but the Xvfb in sites is 1M. my Xvfb is
very slow when gtk_init() is running. I think some optinos should be set
NO, but I don't know. I want to ask if there is any information, just as
Xvfb.cf or host.def, that can help build 1.4M large Xvfb.