Description of problem:
It has happened to me too many times that I have locked
the terminal by mistake - eg while using emacs inside a screen
It is too easy to press ^ax or ^a^x.
Would be better if lockscreen was bound to ^aX.
Also in the current screenrc file, some of the binding
are repeated. Is that intentional?
The shortcut is changed to ^aX. The bindings are repeated because the example
user screenrc is cat'd at the end of the /etc/screenrc file, but why is beyond
me. I will check it out and eventually merge useful changes into
real /etc/screenrc and get rid of the cat.