[daemon.cc] Clang has fixed the bug.
Add "export var=value" syntax to daemon config for adding environment variables.

You could do it previosuly by just sticking it on the "start" line like:

    start=DAVID=david RULES=rules exec echo $DAVID $RULES

...but that got real ugly when the environment variables started piling
up. The new syntax looks much better:

    export DAVID=david
    export RULES=rules
    start=exec echo $DAVID $RULES

Closes: #158357055b
[bug-closed] Add env variables to conf files