New cxs v4.11

Changes:

New feature: –[no]fallback. If clamd produces an error or is unavailable after a scan starts, this option will attempt to use clamscan to scan files until clamd is available again. This option is enabled by default
Additional minor updates to the POD documentation
Modify cxsdaily.sh to fork jobs to prevent hanging on new installs
Added timeout (5 mins) to cxs upgrade routine
Improvements to –wttw [file]