DESC	Pad ambiguous width characters

INPUT
	TYPE	Unicode

OUTPUT
	TYPE	Unicode
	DESC	Append U+000A after ambiguous characters

CTL
	BSDCONV_AMBIGUOUS_PAD
		PTR
			don't care
		INT
			1	Enable
			2	Disable

EXAMPLE
	#used in https://github.com/buganini/bug5
	> echo БИ 2 | bsdconv utf-8:ambiguous-pad:utf-8
	Б И  2
	> echo БИ 2 | bsdconv utf-8:ambiguous-pad:utf-8 | hexdump -C
	00000000  d0 91 c2 a0 d0 98 c2 a0  20 32 0a                 |........ 2.|
	#(the padded character is U+00A0)
