SCP: Added display of all enabled devices which have debugging enabled to the SHOW DEBUG command output.
SCP: Allow ;notelnet option to be specified on the console telnet command as discussed in issue #76
PDP8: Fix Boot doesn't work if IB or saved_DF are previously set wrong (#72). From Bob Supnik

All bootstraps now pass this test case:

d pc 77777
boot <device>
PDP8: Fix LOAD command ignores field change immediately after leader. (#73).  From Bob Supnik and David Gesswein.
Merge branch 'master' of github.com:simh/simh