Security updates for Wednesday

Security updates have been issued by Arch Linux (dovecot, flashplugin, ghostscript, and jenkins), Fedora (glpi, hostapd, python-urllib3, and znc), openSUSE (apache2, audiofile, libqt5-qtvirtualkeyboard, php5, and SDL2), Scientific Linux (kernel), SUSE (curl and dovecot23), and Ubuntu (advancecomp and freeradius).