Lack of quotes results in failure to run the test under older Solaris.
Author: Marina Polyakova, Victor Wagner
Discussion: https://postgr.es/m/
feba89f89e8925b3535cb7d72b9e05e1@postgrespro.ru
# What flavor of host are we on?
# Treat MINGW* (msys1) and MSYS* (msys2) the same.
-testhost=`uname -s | sed s/^MSYS/MINGW/`
+testhost=`uname -s | sed 's/^MSYS/MINGW/'`
# Establish how the server will listen for connections
case $testhost in