clamd_t SELinux domain type is now associated with antivirus domain type (antivirus_t).
Please see
antivirus_selinux
man page for more details.
semanage permissive can also be used to manipulate whether or not a process type is permissive.
semanage module can also be used to enable/disable/install/remove policy modules.
system-config-selinux is a GUI tool available to customize SELinux policy settings.