there might be coolwsds launched from another service which doesn't
match -u coolwsd, so use -t coolwsd instead to capture all of them

then their output might be interleaved, so switch to another log
format that retains the name[pid] and stable sort on that column
so we have all the matching lines for a name[pid] contiguous but
ordered within that by time. After the sort, cut to drop the
columns that are additional over the 'cat' format.

Signed-off-by: Caolán McNamara <caolan.mcnamara@collabora.com>
Change-Id: Id1d1c37001249ff348d6c09c005fb0836133258c