In pick(1), attempt to decode each header field as if it were
[mmh] / test / rcv /
drwxr-xr-x   ..
-rwxr-xr-x 2972 test-rcvdist
-rwxr-xr-x 2301 test-rcvpack
-rwxr-xr-x 6663 test-rcvstore
-rwxr-xr-x 1334 test-rcvtty