[Halld-offline] [EXTERNAL] Proper CCDB hygiene

[Sean Dobbs]

Dear Offliners,

PLEASE exercise caution when modifying the master CCDB - this goes for
new users and old alike.  If you think you are working with an SQLite
copy, while it is good to check the value of the CCDB_CONNECTION
environment variable, it doesn't hurt to use "ccdb -i" to boot the
CCDB CLI into interactive mode and check what output you see there.
Especially if you have something like 50 terminal windows open, as
many of us do.

Thanks for your consideration,
Sean