Security updates for Tuesday

Security updates have been issued by CentOS (ghostscript and spamassassin), Debian (moin, spice, and tomcat8), Fedora (kernel-headers, kernel-tools, and libgit2), Oracle (ghostscript and tomcat), Red Hat (ghostscript and tomcat), Scientific Linux (ghostscript and tomcat), SUSE (git, kernel, python, and samba), and Ubuntu (net-snmp and thunderbird).