Changed the magic tech file so that it recognizes "obsactive" and
will translate it to an FOM waffle drop datatype, so that the change
made to the corner pad in the last commit actually works as advertised.
Rebuilt the custom pad extension GDS library with this change.  Also
corrected an error in the tech file where a missing comma would cause
polysilicon not be recognized during fill pattern generation, leading
to collisions between poly and poly fill shapes.
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 67047b2..d691af2 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -1349,6 +1349,9 @@
 #----------------------------------------------------------------
 # FILLBLOCK
 #----------------------------------------------------------------
+ layer FILLOBSFOM  obsactive
+	calma	22 24
+
  layer FILLOBSM1 fillblock,fillblock4
  	calma 	62 24
 
@@ -1766,12 +1769,12 @@
 #---------------------------------------------------
 # Diffusion and poly keep-out areas
 #---------------------------------------------------
- templayer      obstruct_fom alldiff,allpoly,fomfill,polyfill,obspoly,obsactive
+ templayer      obstruct_fom alldiff,allpoly,fomfill,polyfill,obsactive
 	or	rpw,pnp,npn
         grow    500
 	or	well_guardband
 
- templayer      obstruct_poly alldiff,allpolyfomfill,polyfill,obspoly,obsactive
+ templayer      obstruct_poly alldiff,allpoly,fomfill,polyfill,obsactive
 	or	rpw,pnp,npn
 	grow	1000
 
@@ -2146,6 +2149,7 @@
  ignore HVNTM
  ignore POLYMOD
  ignore LOWTAPDENSITY
+ ignore FILLOBSPOLY
 
  layer pnp NWELL,WELLTXT,WELLPIN
  and PNPID
@@ -3580,6 +3584,8 @@
  layer fillblock  FILLOBSM1,FILLOBSM2,FILLOBSM3,FILLOBSM4
  labels FILLOBSM1,FILLOBSM2,FILLOBSM3,FILLOBSM4
 
+ layer obsactive  FILLOBSFOM
+
 # MOS Varactor
 
  layer var POLY
@@ -3755,7 +3761,10 @@
  calma FILLOBSM1  62  24
  calma FILLOBSM2  105 52
  calma FILLOBSM3  107 24
- calma FILLOBSM4  112 4
+ calma FILLOBSM4  112  4
+ calma FILLOBSFOM  22 24
+ calma FILLOBSPOLY 33 24
+
  calma FOMFILL	  65  28
  calma POLYFILL	  66  28
  calma MET1FILL	  68  28