[9fans] /sys/src/cmd source rebuild

[lucio]

There is a small error in the compilation of /sys/src/cmd/ip/snoopy
(for the ARM, I expect the same for the 386 ... and it is):

        mk snoopy
        5c -FTVw aoemask.c
        ip/snoopy/aoemask.c:42 name not declared: aoerr
        mk: 5c -FTVw aoemask.c  : exit status=rc 5630: 5c 5632: error

I presume a header file hasn't been properly updated by a
replica/pull, any suggestions?

++L