git: kernel - Add sysctls and tunables for [ALT_]BREAK_TO_DEBUGGER, change serial console

[Matthew Dillon]

commit f3944ef19492cc7a21584b4edd0d4caf71b3b205
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Thu Sep 13 02:10:38 2012 -0700

    kernel - Add sysctls and tunables for [ALT_]BREAK_TO_DEBUGGER, change
    	 serial console
    
    * Add kern.break_to_debugger and kern.alt_break_to_debugger sysctls and
      /boot/loader.conf tunables.
    
    * Allows enabling of these features without having to specify the
      related options in the kernel config.
    
    * Do not override current sio settings when checking, inputting, and
      outputing characters via the console functions.  The serial port
      will be set up initially according to the console specs.

Summary of changes:
 sys/dev/serial/sio/sio.c |   45 +++++++++++++++++++++++++++++++++++----------
 sys/kern/tty_cons.c      |   19 +++++++++++++++++++
 sys/sys/consio.h         |    7 +++++++
 3 files changed, 61 insertions(+), 10 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/f3944ef19492cc7a21584b4edd0d4caf71b3b205


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