g.mlist prints out only mapnames with separator, if any, without garbage 
outputs. In addition, map search is also available.

	g.mlist [type=datatype] [map=mapname] [mapset=mapsetname]
		[sep=separator]


examples)
wildcards:
	g.mlist type=vect "r*"
		lists all vector maps starting with letter "r"

regular expressions:
	g.mlist -r type=rast '^soils'
		prints out all soils map with "soils" in their name

	g.mlist -r map='^tmp$'
		prints out "tmp" if "tmp" raster map exists.

	g.mlist -r map='^tmp[0-9]$' type=vect

		tmp0
		tmp5
		tmp6

		prints out "tmp0" ~ "tmp9" if corresponding vector map exists.

	g.mlist -r map='^tmp[0-9]$' type=vect sep=,

		tmp0,tmp5,tmp6

		with separator ','.
		This may be useful for other programs' parameter input.