Modified the seal ring abstract view so that it shows as DRC clean
under DRC style "drc(full)".  Updated the magicrc file to default
to MAGTYPE = "mag", as there are few reasons other than standard
cell layouts to use "maglef" type.
diff --git a/sky130/magic/sky130.magicrc b/sky130/magic/sky130.magicrc
index 7fe3735..601e378 100644
--- a/sky130/magic/sky130.magicrc
+++ b/sky130/magic/sky130.magicrc
@@ -45,7 +45,7 @@
 # from environment variable MAGTYPE
 
 if {[catch {set MAGTYPE $env(MAGTYPE)}]} {
-   set MAGTYPE maglef
+   set MAGTYPE mag
 }
 
 # add path to reference cells