Comment 2 for bug 1835831

I uploaded a workaround, and the gcc-9 upstream patch
http://launchpadlibrarian.net/433155919/squid_4.6-2ubuntu1_4.6-2ubuntu3.diff.gz
and an export of
"-Wno-sizeof-pointer-memaccess -Wno-stringop-truncation"

flags.

It shouldn't make things worse, because the bugs are already there, but at least I unblocked something else, while upstream takes care of them.
(I also pinged the person who did the gcc-9 fixes, asking him to help)