add spc2it manpage from upstream

spctools/spc2it/Makefile

@@ -29,10 +29,13 @@ all: $(TARGET)
 install: $(TARGET)
 	mkdir -p $(DESTDIR)$(PREFIX)/bin
 	cp $< $(DESTDIR)$(PREFIX)/bin/$(TARGET)
+	mkdir -p $(DESTDIR)$(PREFIX)/share/man/man1/
+	cp spc2it.1 $(DESTDIR)$(PREFIX)/share/man/man1/
 	
 .PHONY: uninstall
 uninstall:
 	rm -f $(DESTDIR)$(PREFIX)/bin/$(TARGET)
+	rm -f $(DESTDIR)$(PREFIX)/share/man/man1/spc2it.1
 
 .PHONY: clean
 clean:

spctools/spc2it/spc2it.1

@@ -0,0 +1,27 @@
+.TH spc2it "1" "September 10 2018" "User Commands"
+.SH NAME
+spc2it \- converts SPC700 sound files to the Impulse Tracker format
+.SH SYNOPSIS
+.B spc2it
+.RI [ options ] " filename"
+.TP
+Where <filename> is any .spc or .sp# file
+.SH DESCRIPTION
+This manual describes the
+.B spc2it
+command. It converts SPC files to IT (Impulse Tracker) files.
+.TP
+Options:
+.TP
+\fB\-t\fR x
+Specify a time limit in seconds        [60 default]
+.TP
+\fB\-d\fR xxxxxxxx Voices to disable (1\-8)           [none default]
+.TP
+\fB\-r\fR xxx
+Specify IT rows per pattern            [200 default]
+.IP
+.SH "SEE ALSO"
+.BR adplay (1),
+.BR schismtracker (1).
+.br