Use panel interface
applied Martti Kühne's dmenu monitor patch
https://gist.github.com/mar77i/3349298/raw/f6581ca96627f4c71c0bd1faf531daaf2a613b95/monarg.patch becomes upstream now
applied Martin Kühl's inverse matching flag to stest
panel protocol moved into swc.xml
Port to new wld API
Adapt to wld changes
updated copyright notices in LICENSE and dmenu.c file
Use swc protocol installed with swc
Merge remote-tracking branch 'origin/master' into wayland-panel
fix crash with ctrl-enter as input

reproduce: ./dmenu; send EOF; press ctrl+enter.
applied Hiltjo's patch as suggested on the ml to fix ControlMask for C-j and C-m
Adapt to new wld_draw_text
Merge remote-tracking branch 'suckless/master' into wayland-panel