use LDFLAGS to build dwl target

do not generate *-protocol.{c,o}

according with
https://gitlab.freedesktop.org/wlroots/wlroots/-/commit/62fbf3f4ba1b2993e29dfb46f077e5806f7aac1c
they are unused and wlroots-based compositors don't need to do this

include xcb only when building with xwayland support

convert makefile to be more portable

add dist target

add flag to print version and exit

add DESTDIR

don't let -pedantic be overridable by environment

new functions ecalloc() and die()

die() replaces EBARF and BARF
and allow us to add `-pedantic` to CFLAGS

Merge pull request #180 from Humm42/manpage

add dwl(1)

add dwl(1)

Documentation is good.  Man pages are documentation.  A program without
a man page is worthless.

Merge branch 'main' into wlroots-next

Merge pull request #112 from JaGoLi/main

Add uninstall target in makefile like dwm

added uninstall target

Merge branch 'main' into pipe-status

group phony targets together in Makefile

re-compile if config.mk changes

remember to add client.h in Makefile

add "all" target

Merge updates from guidocella

Thanks so much for helping to keep the project running while life was
crazy!