Switch regex type from sys:regex to regex.

The sys:regex internal symbol was historically used when
derivative-based regexes had a S-exp representation headed
by that symbol. It had to be a private symbol.
Now the regex symbol is only used as the COBJ class type
for regexes; it makes no sense for it to be in the sys
package. We want user code to be able to refer to this
type using a public symbol.

* lib.c (obj_init): Intern the regex symbol stored
in regex_s in user_package.

* txr.1: Include regex in the type graph in the
Object Type section, and in the type list under
the typeof function.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib.c b/lib.c
index 245f49c5..47b028cf 100644
--- a/lib.c
+++ b/lib.c
@@ -8698,7 +8698,7 @@ static void obj_init(void)
   rcons_s = intern(lit("rcons"), user_package);
   var_s = intern(lit("var"), system_package);
   expr_s = intern(lit("expr"), system_package);
-  regex_s = intern(lit("regex"), system_package);
+  regex_s = intern(lit("regex"), user_package);
   nongreedy_s = intern(lit("ng0+"), user_package);
   quote_s = intern(lit("quote"), user_package);
   qquote_s = intern(lit("qquote"), user_package);