Allow custom player/command upon track play

PLAYER='deedee of=$id' dzr

Working pure shell re-implementation of the previous C version.
Tested on OpenBSD, Ubuntu, Android+Termux

Add modular HTTPS support with the -DUSE_SSL flags.

This flag allow to build dzr without LibSSL, as static binary (see *_static artifact) using :

musl-gcc -static dzr.c

See #3 for example
DZR_API supersede the pain-in-the-ass-time-limited DZR_SID method