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.

remove log flags from readme

The following commit has removed the logs but they are still in the
readme.
3b1992ca91b9a468019165c985263f5b1cc78c2c">https://github.com/djpohly/dwl/commit/3b1992ca91b9a468019165c985263f5b1cc78c2c

Readme: achieve fullscreen + allow borderpx = 0

update README

add some more hands-off protocols

change text wrapping

editors are more than capable here

add zero flicker to goals

have selborder, still no urgent support from Wayland

add non-goals list to README

update README to reflect work on XWayland

note wlroots-git requirement

Fixes #9.

Revert to @arp242's suggestion

because directory permissions

Handle missing XDG_RUNTIME_DIR explicitly

Also update the documentation to indicate that this is a Wayland thing
and not dwl-specific.

Add startup errors, mention XDG_RUNTIME_DIR in README

It was just exiting with code 1 for me. The problem turned out to be
that you *need* to set XDG_RUNTIME_DIR or it won't work (I think e.g.
systemd does that for you, but on Void it's not set by default), so
mention that in the README.

document -qvd options

remember export-dmabuf for when it's fixed in wlr

update note about texture

thoughts for readme

update README

Sad to see Wayland has no replacement for urgency hint yet.

fix multi-dpi scaling