Fix damange from wrongly split commit in fdf81c9a6cf94.

Unfortunately I mistakenly split the commit wrongly into two parts,
leaving one part of renaming StreamLog to StreamLogicalLog in the
second commit. Which isn't backported to 9.4...
Fix it in 9.4 only, as master already is 'fixed' by the subsequent
commit.

Noticed by Jan Wieck and the buildfarm.