since this project is a skeleton and not meant to clutter up the code
that will actually consume the bot, i've opted to consolidate the
majority of files under a single directory and minimise extra files

*: move code to util/
*: move include files to include/dbs/
net: consolidate net functions into single file
config: remove config

we apply .env files from both the current working directory and the
directory of the executable we're running from

very simple .env format, KEY=VALUE, comments prepended with # on first
character of line only.

use switch{case} instead of if statements for determining action upon
signal

design choice since 1 << n == pow(2,n)

since we moved our signal handlers to be created before subsystems are
created, our new signal handlers (which namely blocks SIGTERM, used for
panicing) are passed on.  in order to restore full panic functionality,
we clear all signal blocks before passing execution to the subsystem

in panic, when killing process group, set pid to 0, where it gets our
pgid for us, using kernel optimisations, saving a trip to kernel land to
get the pgid ourselves

prevents potential race condition where a subsystem can terminate before
we fully block SIGCHLD, causing SIGCHLD to be sent to init and having
our entire process terminated ungracefully.

prevents bash and family from sending "Terminated" due to our process
receiving SIGTERM during a panic, since we already exit in there and
it'd be queued up if we do receive one

in log: we ensure we panic by killing our process group with SIGTERM,
raising it for ourselves, and exiting (if all else fails simply).
in init: we catch SIGTERM and exit with 0 if we get it, as bash (and
likely others) prints a nasty "Terminated" to stderr