- asan_build: build ASAN included
- debug_build: build more suitable for debugging
- added patches
neccessary for running with ASAN
+ netpbm-asan.patch

- version update to 10.86.3
* pnmtopng: Fix bug: Defaults to no filters. Should be all
filters. Effect is larger PNG output. Broken after Netpbm
10.26 (January 2005) but no later than Netpbm 10.35 (August
2006).
* pnmtopng: Fix bug: Doesn't allow multiple filter options.
Broken after Netpbm 10.26 (January 2005) but no later than
Netpbm 10.35 (August 2006).
* pnmcrop: Don't allow -borderfile with -reportXXX. It doesn't
work.
* pnmcrop: fix bug: -bgcolor doesn't work. Always present
(-bgcolor was introduced in Netpbm 10.86 (March 2019)).
* pnmcrop: fix bug: incorrect identification of background with
-bgcolor and PBM or PGM image. Always present (-bgcolor was
introduced in Netpbm 10.86 (March 2019)).
* Add pamfind.
* Add pambrighten.
* Add pamhue.
* pnmcrop: Add -bg-color, bg-corner, -reportfull, -reportsize,
-blank-image .
* pamtopng: Add -interlace .
* pamenlarge: Add -scale, -xscale, -yscale .
* pamenlarge: Much faster for PBM with xscale factor above 10;
slightly faster for xscale factor 2-10.