Enable illumos gss support.  It is incorrectly assumed to be heimdal--do not add to libcurl.pc file
--- curl-8.11.1/configure.ac.~1~	2024-12-11 02:08:12.000000000 -0500
+++ curl-8.11.1/configure.ac	2024-12-11 16:44:46.448078749 -0500
@@ -2054,6 +2054,9 @@
             *-hp-hpux*)
               gss_libname="gss"
               ;;
+            *solaris2*)
+              gss_libname="gss"
+              ;;
             *)
               gss_libname="gssapi"
               ;;
@@ -2076,6 +2079,9 @@
       *-hp-hpux*)
         LIBS="-lgss $LIBS"
         ;;
+      *solaris2*)
+        LIBS="-lgss $LIBS"
+        ;;
       *)
         LIBS="-lgssapi $LIBS"
         ;;