Formatting change: tabs to spaces (4 spaces per indent)
Minor bugfix: doesn't complain if conf file missing
Fix issue #3: check alias exists before msg input
Fixed issue #2: Meteor session cookies become invalid

The login cookie, MyMetorCMS-cookie, has an expiry of 2 hours after
login. The session cookie, JSESSIONID, was previously being set to the
same timestamp as the login cookie (since not doing so would mean the
session cookie would be discarded after program exit). However, if there
is no account activity for 30 minutes then the session cookie becomes
invalid and the session ends.

Need to set the session cookie to expire after 30 minutes. If there is
subsequent account activity, reset expiry to an additional 30 minutes
from current time. This works because upon every request, the server
updates the login cookie's expiry to 2 hours from request time.

Resolved by applying O2 logic for Meteor accounts.