Log Message:
Update x11/dmenu to 4.6.

Changes:
Features:
  - Now uses Xft for font rendering by default with fallback-font
support, this also allows anti-aliased fonts and such.
    The font string matching will be different, check out
http://www.freedesktop.org/software/fontconfig/fontconfig-user.html
for the font string syntax, huge thanks to Eric Pruitt and the other
people who worked on the dmenu-xft patch (previously on the wiki).
  - Uses a shared libdraw codebase (also used for dwm right now).
  - Merged wiki patches:
    - monarg: allow to specify monitor number to start on with -m (Martin Kühl).
    - multisel: allow selecting multiple items (ctrl-enter) (Evan Gates).
    - xft: see above.
  - Accepted vi'is exit approach ^[ (Arkaduisz).
  - Add ^G escape keybinding (Karl F).
  - Separate config options to config.h (Alex Sedov).
  - Support keybind C-S-[jm] (Connor Lane Smith).
  - stest: get rid of getopt, use suckless arg.h (Hiltjo).
  - stest: support inverse matching (flag -v) (Martin Kühl).

Notable fixes:
  - Buffer nul termination on tab (Alex Sedov's).
  - Crash (pointer dereference) with ctrl-enter as input (Hiltjo).
  - Ignore prompt if it is empty in addition to NULL (Moritz Wilhelmy).
  - Incorrect ordering of match results (Davide Del Zompo).
  - Input text matching (Quentin Rameau).
  - Paste from clipboard (ctrl+shift+y) (Joshua Lloret).
  - Replace deprecated usleep() with nanosleep() (Quentin Rameau).
  - dmenu_run: Split cache logic to dmenu_path again (Quentin Glidic).
  - multimon: always spawn client on first monitor if specified with
-m 0 (Hiltjo).
  - reset ControlMask for C-j and C-m (Hiltjo).

Build improvements:
  - config.mk: add $FREETYPELIBS and $FREETYPEINC, simpler to override
(ports and *BSDs).
  - config.mk: improve feature test check (k0ga, stateless).
  - config.mk: use -std=c99 by default.