acd_cli mount: file system accesses hang after network switch

[tobiasgrosser]

Hi,

I observed pretty consistenly that an acd_cli mount that works fine. It will also correctly report an error at each file-system access, when I loose network connection and will come back when the connection is re-established. However, reconnecting through a different connection (e.g. after moving to a different WLAN) results in file system accesses to just hang.

This causes problems with btrbk: digint/btrbk#99