ddb scripts now load by default

I've changed the default value of ddb_enable to YES so we now load ddb
scripts from ddb.conf by default.  Developers expecting to perform
active deugging should add ddb_enable=NO or change the script to not
perform at textdump and reboot the machine.

This is another step toward hopefully shipping 8.0 with DDB built
in and generating useful crash dumps.  The security implications of
doing so need to be carefully considered and in particular the GENERIC
kernel will probably want to be shipped with at least the options
DDB_UNATTENDED and SC_DISABLE_KDBKEY.

The fact that the watchdog driver changes it's behavior based on
DDB_UNATTENDED is probably a bug that should be fixed.

-- Brooks

----- Forwarded message from Brooks Davis <brooks_at_FreeBSD.ORG> -----

From: Brooks Davis <brooks_at_FreeBSD.ORG>
Date: Mon, 21 Apr 2008 18:18:00 +0000 (UTC)
To: brooks_at_FreeBSD.ORG
Subject: [src] cvs commit: src/etc/defaults rc.conf

brooks      2008-04-21 18:17:48 UTC

  FreeBSD src repository

  Modified files:
    etc/defaults         rc.conf 
  Log:
  Change the default of ddb_enable to YES so we default to generating textdumps
  on panic.  This means you get a potentially useful dump even if your system
  is running X when you panic.
  
  X-MFC after:    never
  
  Revision  Changes    Path
  1.332     +1 -1      src/etc/defaults/rc.conf
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Index: src/etc/defaults/rc.conf
diff -u src/etc/defaults/rc.conf:1.331 src/etc/defaults/rc.conf:1.332
--- src/etc/defaults/rc.conf:1.331	Sun Apr 20 20:37:20 2008
+++ src/etc/defaults/rc.conf	Mon Apr 21 18:17:48 2008
_at__at_ -33,7 +33,7 _at__at_
 apm_enable="NO"		# Set to YES to enable APM BIOS functions (or NO).
 apmd_enable="NO"	# Run apmd to handle APM event from userland.
 apmd_flags=""		# Flags to apmd (if enabled).
-ddb_enable="NO"		# Set to YES to load ddb scripts at boot.
+ddb_enable="YES"	# Load ddb scripts at boot.
 ddb_config="/etc/ddb.conf"	# ddb(8) config file.
 devd_enable="YES" 	# Run devd, to trigger programs on device tree changes.
 devd_flags=""		# Additional flags for devd(8).


----- End forwarded message -----