Measuring Buffer

This emergency release disables hash calculation support due to potential data
corruption when the buffer runs full.

Please do not use hash calculation support of mbuffer for now.

This issue is under investigation.

This release adds an option for a watchdog that terminates mbuffer if either input or output stream stall for a specified time, adds support for float values as arguments to options, and has some cleanup and a build fix.

This release fixes IPv6 client initialization on FreeBSD, suppresses the summary if -q is used with -l, and fixes a potential hang with option -P 100.

Some enhancements concerning multi-volume handling, new options for appending/truncating an output file, and a bugfix concerning I/O error handling.

An option was added to terminate on any kind of error. A hang when starting mbuffer in the background was fixed. The displayed dimensions were changed to be compliant to SI standards.