Re: [dev] [dwm] Add i3 to differences in http://dwm.suckless.org/

[Ivan Tham]

I does not like to compile as when I run `make`:
```
dwm build options:
CFLAGS   = -std=c99 -pedantic -Wall -Wno-deprecated-declarations -Os
-I/usr/X11R6/include -D_BSD_SOURCE -D_POSIX_C_SOURCE=2 -DVERSION="6.1"
-DXINERAMA
LDFLAGS  = -s -L/usr/X11R6/lib -lX11 -lXinerama
CC       = cc
creating config.h from config.def.h
CC drw.c
CC dwm.c
dwm.c:40:37: fatal error: X11/extensions/Xinerama.h: No such file or directory
compilation terminated.
Makefile:18: recipe for target 'dwm.o' failed
make: *** [dwm.o] Error 1
```

And what does the Xlib header files means in the README?