Add back SUDOERS_NAME_MATCH and enable it when fuzzing.

This avoids the test environment from influencing sudoers matching.

plugins/sudoers/match_digest.c

@@ -38,6 +38,7 @@
 #include "sudo_digest.h"
 #include <gram.h>
 
+#ifndef SUDOERS_NAME_MATCH
 bool
 digest_matches(int fd, const char *path, const char *runchroot,
     const struct command_digest_list *digests)
@@ -133,3 +134,15 @@ done:
     free(file_digest);
     debug_return_bool(matched);
 }
+#else /* SUDOERS_NAME_MATCH */
+bool
+digest_matches(int fd, const char *path, const char *runchroot,
+    const struct command_digest_list *digests)
+{
+    debug_decl(digest_matches, SUDOERS_DEBUG_MATCH);
+
+    /* Digests are not supported when matching only by name. */
+
+    debug_return_bool(false);
+}
+#endif /* SUDOERS_NAME_MATCH */