Issue #2880445 by pjcdawkins, japerry, gargsuchi, q0rban: Config sync should not throw a warning when not being writable

Issue #2838095 by cilefen, pjcdawkins: Only one site slogan character in site slogan when using PHP 7.1

Issue #728702 by Crell, daffie, pillarsdotnet, pjcdawkins, Damien Tournoud, David_Rothstein, reglogge, amateescu, tim.plunkett, tstoeckler, xjm, hussainweb, alexpott, cweagans, Tor Arne Thune, catch: Visiting index.php should redirect to install.php if settings.php already has database credentials but database is empty

Issue #2466197 by alexpott, heddn, dawehner, pjcdawkins: Staging directory should not have to be writeable

Issue #2451363 by alexpott, Berdir, pjcdawkins: Ensure install_profile is exists in settings.php after installation