Support for coin toss

[yashvardhan-kukreja]

$ dig coin @dns.toys
;; ANSWER SECTION:
coin.                   1       IN      TXT     "tossed = [heads]"

$ dig 2.coin @dns.toys
;; ANSWER SECTION:
coin.                   1       IN      TXT     "tossed = [heads, tails]"

$ dig 42.coin @dns.toys

;; ADDITIONAL SECTION:
.                       1       IN      TXT     "error: toss overflow"