true color by setting 'COLORTERM=truecolor' in the environment. This is
useful on systems such as FreeBSD which ships only with "etc/termcap".
-** On GNU/Linux systems, Emacs now supports loading a Secure Computing
-filter. To use this, you can pass a --seccomp=FILE command-line
-option to Emacs. FILE must name a binary file containing an array of
-'struct sock_filter' structures. Emacs will then install that list of
-Secure Computing filters into its own process early during the startup
-process. You can use this functionality to put an Emacs process in a
-sandbox to avoid security issues when executing untrusted code. See
-the manual page for 'seccomp' for details about Secure Computing
+** Emacs now supports loading a Secure Computing filter.
+This is supported only on capable GNU/Linux systems. To use this,
+use the '--seccomp=FILE' command-line option when starting Emacs.
+FILE must name a binary file containing an array of 'struct sock_filter'
+structures. Emacs will then install that list of Secure Computing
+filters into its own process early during the startup process. You
+can use this functionality to put an Emacs process in a sandbox to
+avoid security issues when executing untrusted code. See the manual
+page for 'seccomp' system call, for details about Secure Computing
filters.
\f