When listing ports with aplaymidi/arecordmidi, show only
ports that understand MIDI messages, i.e., that have the
SND_SEQ_PORT_TYPE_MIDI_GENERIC flag set.
This patch converts hyphens to minus signs in the man pages (for options,
emails, or command line examples).
This patch also closes one font modifier in iecset.1.
(s/\fIfalse\fI,/\fIfalse\fP,/)
Signed-off-by: Nicolas FRANCOIS <nicolas.francois@centraliens.net>