NetworkManager-openconnect documentation update

[muriloo br ibm com]

Hi guys,

I was checking the Network Manager debugging
page [1] and I missed a section for Debugging NetworkManager-openconnect.

I think it could be (need to confirm
with NM developers - cc'ed):

    * killall -TERM nm-openconnect-service
    * in a root terminal,
run 

NM_OPENCONNECT_DEBUG=1 /usr/libexec/nm-openconnect-service

    * start your VPN connection
    * reproduce the problem
    * send the nm-openconnect-service
output to the developers

[1] http://live.gnome.org/NetworkManager/Debugging

Thanks,
Murilo Opsfelder Araujo