[CM] Snd 18.9

[bil at ccrma.Stanford.EDU]

Snd 18.9:

Kjetil updated the s7webserver directory

s7: variables can be statically typed via the built-in type checkers 
like integer?
       for example, (set! (setter 'x) integer?)

audio.c: added JACK_AUTO_SRC (defaults to 1).

checked: FC 29 (gcc 8.2.1), macOS Mojave, sbcl 1.4.13

Thanks!: Kjetil Matheussen