Add in rcfile support for undo since it would be bad to overly punish the masochists who want to try it out and hopefully submit bug reports.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4396 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

doc/man/nanorc.5

@@ -202,6 +202,9 @@ Convert typed tabs to spaces.
 .B set/unset tempfile
 Save automatically on exit, don't prompt.
 .TP
+.B set/unset undo
+Enable experimental generic-purpose undo code.
+.TP
 .B set/unset view
 Disallow file modification.
 .TP

src/rcfile.c

@@ -89,6 +89,7 @@ static const rcoption rcopts[] = {
     {"smarthome", SMART_HOME},
     {"smooth", SMOOTH_SCROLL},
     {"tabstospaces", TABS_TO_SPACES},
+    {"undo", 0},
     {"whitespace", 0},
     {"wordbounds", WORD_BOUNDS},
 #endif
@@ -908,6 +909,15 @@ void parse_rcfile(FILE *rcstream
 	option = ptr;
 	ptr = parse_next_word(ptr);
 
+#ifndef NANO_TINY
+	/* FIXME: Hack which should go away ASAP */
+	if (strcasecmp(option,  "undo") == 0) {
+	    use_undo = TRUE;
+	    shortcut_init(0);
+	    continue;
+	}
+#endif
+
 	for (i = 0; rcopts[i].name != NULL; i++) {
 	    if (strcasecmp(option, rcopts[i].name) == 0) {
 #ifdef DEBUG