Manpages of src:mapserver in Debian bullseye-backports

• legend(1)
• mapserv(1)
• msencrypt(1)
• scalebar(1)
• shp2img(1)
• shptree(1)
• shptreetst(1)
• shptreevis(1)
• sortshp(1)
• tile4ms(1)