sed: Update to 4.4

sed: Update to 4.4

Hi,

'sed' hasn't been updated in IPFire for a few years - I thought it could
be worthy an update:

Excerpt from 'NEWS':

"* Noteworthy changes in release 4.4 (2017-02-03) [stable]

  sed could segfault when invoked with specific combination of newlines
  in the input and regex pattern. [Bug introduced in sed-4.3]"

"Noteworthy changes" from release 4.2.2 to 4.3 can be found in 'NEWS' file, too much
to list them all...

Best,
Matthias

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>