feat(ft): added dnsmasq support (#402)

Reference: man 8 dnsmasq.

> Lines starting with # are comments and ignored.

Author: staticssleever668

lua/Comment/ft.lua

@@ -58,6 +58,7 @@ local L = setmetatable({
     cuda = { M.cxx_l, M.cxx_b },
     dart = { M.cxx_l, M.cxx_b },
     dhall = { M.dash, M.haskell_b },
+    dnsmasq = { M.hash },
     dosbatch = { 'REM%s' },
     dot = { M.cxx_l, M.cxx_b },
     dts = { M.cxx_l, M.cxx_b },