update comments and remove debugging printf

Define monitor order with monrules[]

The order in which monitors are defined in monrules[] actually matters.

Monotors that aren't configured in monrules[], it will always be the
leftmost.

don't reset the cursor image

...in internal calls to restore pointer focus. Necessary for the
unclutter patch, and there's no harm in avoiding this call even in
mainline; might prevents issues in same edge cases.

update README.md

- A maximum SLOC can't be reasonably determined before implementing the
missing protocols, so not any time soon

- dwl definitely isn't a simple as dwm since it must implement lots of
Wayland protocols and not just manage windows. The status bar
integration, layer shell popups, damage tracking and IME are gonna
require hundreds more lines each.

- "Buffering of input when spawning a client so you don't have to wait
for the window (use `wl_client_get_credentials` to get the PID) - would
this require passing through something like dmenu?  Extension protocol?"
This sounds exoteric, if anything this should be patch.

- Can dwl really be started from within an X session? When I do it from
dwm it crashes.

- A window's texture is scaled for its "home" monitor only (noticeable
when window sits across a monitor boundary)
Gonna open a ticket for this rather than keep it in the README.

say TODO

just wtf is XXX supposed to be? It sounds like a pornographic thing.

rename drw

It's impossible to understand that this stands from drawable if you're
not familiar with dwm's code.

don't notify of activity

...or update selmon when we just want to restore pointer focus.

deactivate the focused client on overlay focus

replace shouldfocusclients with checking old

And don't activate clients while an overlay is focused.

fix keyboard focus with overlays

Don't let internal calls to motionnotify(0) meant to update the pointer
focus from maplayersurfacenotify and destroylayersurfacenotify also
shift the keyboard focus to the surface under the cursor with
sloppyfocus.

ensure that xwayland cursor defaults to left_ptr

Don't show an X cursor when closing an Xwayland window or with certain
dropdowns.

Based on https://github.com/djpohly/dwl/pull/32

enable adaptive sync

The comment in this function's declaration says the backend is free to
ignore this setting, so maybe there's no need to make it configurable?

use bool

Because it's 2020. Passing integers to wlroots variables and functions
with bool in their signature is silly.

remove -Werror=declaration-after-statement

wtf is the point of this crap? It makes the code harder to follow,
increases the line count and made me fail compilation a million times.
We shouldn't blindy follow everything about suckless's style.

remove goto when the border is 0

Rendering 0-dimension rectangles no longer crashes wlroots.

remove useless assignment

calloc already initializes ints to 0.

s/maprequest/mapnotify

This should be consistent with other function names instead of keeping
the X name.

add install target to Makefile and corresponding prefix variable to config.mk

tweak trackpad variables

Add static const and move them below in order to group the keyboard
options.

Added support for natural scrolling