Don't just remove a symlink on removal, ensure that it points

to an expected name before doing so.  Should prevent removal of
required symlinks which might otherwise happen when this package
by accident is instsalled and subsequently de-installed on
9.0 - 9.2 or other netbsd-9 variants.
Parts of fix for PR#56597.

emulators/compat_netbsd/INSTALL.ELF

@@ -1,4 +1,4 @@
-# $NetBSD: INSTALL.ELF,v 1.2 2013/02/17 10:34:31 spz Exp $
+# $NetBSD: INSTALL.ELF,v 1.3 2022/01/02 16:15:55 he Exp $
 
 # Generate a +ROOT_ACTIONS script that runs certain actions that require
 # superuser privileges.
@@ -83,8 +83,15 @@ REMOVE,0)
 		esac
 
 		if ${TEST} -h "$dst"; then
-			${ECHO} "${PKGNAME}: removing $dst"
-			${RM} -f "$dst"
+			lsrc=$(readlink $dst)
+			if [ "$lsrc" = ${PKG_PREFIX}/$src -o \
+			     "$lsrc" = $src ]
+			then
+				${ECHO} "${PKGNAME}: removing $dst"
+				${RM} -f "$dst"
+			else
+				${ECHO} "${PKGNAME}: mismatched symlink, skipping removal of $dst"
+			fi
 		fi
 	done
 	${RM} -f ${ROOT_ACTIONS_COOKIE}