Due to recent changes to support continued processing of empty string command
results, ProcessManager::execute_process() now returns undefined value, which
causes Interpreter::interpret() to continue looping through registered command
interpreters after successfully handling a command.
This causes some plugins, i.e. Plugin/Date.pm, to continue the interpret() loop
after successfully handling a command, which causes additional interpreters to
handle the command, leading to both a built-in command an a factoid command
being invoked if they share the same name.
Applets::execute_applet() now returns the defined empty string to let the
interpreter loop know that the command has been handled.
general.debugcontext: filter out cmdlist and arglist
Core/Applets: log applet start/stop and duration
Core/ProcessManager: fix potential race-condition with $context object
Core/Interpreter:
* expand pronouns before command-substitution
* attempt to find current channel's factoid instance for metadata
* remove duplication of command history in command-substition
* terminate pipe/substitution processing when protecting self
Core/Factoids: limit -url contents to 250kb
"Applet" is a much better name for the external command-line
scripts and programs that can be loaded as PBot commands. They
will no longer be confused with Perl modules.
https://en.wikipedia.org/wiki/Applet
