There's no mention of SS0 or SS1 functions in ECMA-48 or ECMA-35.
0x0E/0x0F are SO/SI (Shift In/Out) in "7-bit environments" or LS0/LS1
(Locking Shift 0/1) in "8-bit environments". The former is the one
that applies to foot, since it generally follows "7-bit" conventions
due to its use of UTF-8.
See also: ECMA-35 §7.2 and §9.2.
In a recent Debian build from master, Lintian complained about a bad
whatis entry for this manual page. The tag description [1] says a NAME
section is required. It is added here.
[1] https://lintian.debian.org/tags/bad-whatis-entry.html
