pycosh: support hosts where user and/or hostname cannot be read
pycosh: support hosts where user and/or hostname cannot be read

01org/fMBT,violep01/fMBT,mixu-/fMBT,01org/fMBT,mixu-/fMBT,yoonkiss/fMBT,yoonkiss/fMBT,yoonkiss/fMBT,mixu-/fMBT,violep01/fMBT,01org/fMBT,violep01/fMBT,01org/fMBT,violep01/fMBT,01org/fMBT,mixu-/fMBT,mixu-/fMBT,violep01/fMBT,yoonkiss/fMBT,yoonkiss/fMBT