add a keybinding for saving scrollback buffer contents

Will also want a post processing script, that:
 a) moves it out of the default /tmp/screen-exchange location
 b) cleans up leading blank lines
 c) ...

This bug was fixed in the package byobu - 2.74-0ubuntu1

---------------
byobu (2.74-0ubuntu1) maverick; urgency=low

  * usr/lib/byobu/disk_io: fix regex to support RAID devices, LP: #572855
  * debian/postinst: make debconf question failsafe, LP: #569041
  * usr/bin/byobu, usr/share/byobu/profiles/byoburc: add support for
    different window sets, LP: #517796
  * usr/bin/byobu-select-session: use screen -ls, less overhead
  * usr/share/man/man1/byobu.1: document the different window sets

byobu (2.73-0ubuntu1) maverick; urgency=low

  [ Dustin Kirkland ]
  * usr/bin/byobu-reconnect-sockets: look for gpg sessions quietly
  * usr/bin/byobu-launcher: ensure that if user does not want a nested
    session, they still get a local shell

  [ Jon Bernard ]
  * etc/byobu/statusrc, usr/bin/byobu-config, usr/lib/byobu/rcs_cost,
    usr/share/byobu/profiles/common, usr/share/man/man1/byobu.1:
    - Rackspace cost estimation (based on the ec2 one)

byobu (2.72-0ubuntu1) maverick; urgency=low

  * usr/bin/byobu: support nethack screen mode, LP: #568751
  * usr/share/man/man1/byobu.1: document a sample custom script using
    custom colors, LP: #568967
  * usr/bin/byobu: LANG=C before grepping for text
  * usr/bin/byobu: handle unset term in tput 256 color check
  * bin/byobu-config, lib/byobu/disk_io, share/byobu/profiles/common,
    share/man/man1/byobu.1: added a disk throughput notification
  * usr/bin/byobu-janitor: add hyphenation to the regex to allow for
    disk_io
  * usr/lib/byobu/disk_io: improve MONITORED_DISK overriding
  * usr/lib/byobu/disk: minor simplification

byobu (2.71-0ubuntu1) maverick; urgency=low

  * usr/bin/byobu-launch, usr/bin/byobu-launcher-install,
    usr/bin/byobu-janitor: exit 0 after launching byobu; this is superior
    to previously reverted implementations where we exec'd byobu, since
    we'll only exit 0 if the byobu/screen session exits cleanly; this will
    keep the user from having to do the double-exit when detaching,
    LP: #568306

byobu (2.70-0ubuntu1) maverick; urgency=low

  * usr/bin/byobu-launcher: fix regression in last upload

byobu (2.69-0ubuntu1) lucid; urgency=low

  * usr/bin/byobu-launcher: prompt on nested screen connection, LP: #565398
  * debian/po/POTFILES.in, debian/po/de.po, debian/po/en_GB.po,
    debian/po/es.po, debian/po/pt.po, debian/po/ru.po,
    debian/po/templates.pot, po/bg.po, po/cs.po, po/de.po, po/es.po,
    po/fr.po, po/hu.po, po/is.po, po/it.po, po/la.po, po/lt.po, po/nl.po,
    po/pt.po, po/pt_BR.po, po/ru.po, po/sv.po, po/tr.po, po/uk.po:
    - translations merged, LP: #567309
  * bin/byobu-janitor, share/byobu/keybindings/f-keys,
    share/byobu/profiles/common, share/man/man1/byobu.1: add a keybinding,
    ctrl-a ~ to write the current window's buffer to a file, LP: #565399
  * debian/control, debian/screen-profiles.postinst, debian/preinst,
    debian/prerm, debian/rules, usr/bin/byobu-janitor:
    - remove more remnants of screen-profiles
  * debian/rules: drop color symlinks, no longer necessary, should be
    cleaned up by byobu-janitor now
 -- Dustin Kirkland <email address hidden> Wed, 28 Apr 2010 23:11:14 -0500