MFH: r508588 r511559
graphics/netpbm: Update to 10.87.01
Changes: https://gitlab.com/tobiask/netpbm/raw/v10.87.01/doc/HISTORY
graphics/netpbm: Update to 10.87.02
Changes: https://github.com/t6/netpbm/blob/v10.87.02/doc/HISTORY
Approved by: ports-secteam blanket