Re-enable egrep and fgrep instead of using the stupid scripts.

--- ./src/grep.c.orig	2024-12-22 20:42:23.002065261 +0100
+++ ./src/grep.c	2024-12-22 20:48:08.290498031 +0100
@@ -2469,6 +2469,25 @@
   intmax_t default_context;
   FILE *fp;
   exit_failure = EXIT_TROUBLE;
+
+  /* check basename to preset matcher */
+  do {
+    const char *basename;
+
+    /* find and skip last slash */
+    basename = strrchr(argv[0], '/');
+    if (basename)
+      basename++;
+    else
+      basename = argv[0];
+
+    /* update matcher on known names */
+    if (strcmp(basename, "egrep") == 0)
+      matcher = setmatcher ("egrep", matcher);
+    else if (strcmp(basename, "fgrep") == 0)
+      matcher = setmatcher ("fgrep", matcher);
+  } while (0);
+    
   initialize_main (&argc, &argv);
 
   /* Which command-line options have been specified for filename output.