Skip Shell check on Windows (#3973)
Skip Shell check on Windows (#3973)

Fixes `mc: <ERROR> Failed to enable autocompletion. Cannot 
determine shell-type and SHELL environment variable found: exit status 1.` 
on Windows.


vadmeste/mc,balamurugana/mc,krisis/mc,krisis/mc,vadmeste/mc,balamurugana/mc,minio/mc,minio/mc