show dbg-all and dbg-none re-anabled with slight syntax change: as dbg_all and dbg_none

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12448 6c8e4198-a580-4521-a02f-c9ae86df1db9
improved show debugger command help message

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12449 6c8e4198-a580-4521-a02f-c9ae86df1db9
corrently support 'show all' debugger command

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12450 6c8e4198-a580-4521-a02f-c9ae86df1db9