Squid-2.3.DEVEL2: --enable-underscores
    Added --enable-underscores to have Squid not reject hostnames with _ as
    part of their name. Squid by default rejects such names to conform with
    internet standards.  (this only adds the configure option to define
    ALLOW_HOSTNAME_UNDERSCORES, the code has been there since long back)

Index: squid/acconfig.h
diff -u squid/acconfig.h:1.1.1.23 squid/acconfig.h:1.1.1.23.2.1
--- squid/acconfig.h:1.1.1.23	Sat Aug  7 17:12:37 1999
+++ squid/acconfig.h	Sun Aug  8 02:48:57 1999
@@ -251,3 +251,9 @@
  * Do we want to use truncate(2) or unlink(2)?
  */
 #undef USE_TRUNCATE
+
+/*
+ * Allow underscores in host names
+ */
+#undef ALLOW_HOSTNAME_UNDERSCORES
+
Index: squid/configure
diff -u squid/configure:1.1.1.33.2.1 squid/configure:1.1.1.33.2.2
--- squid/configure:1.1.1.33.2.1	Sat Aug  7 20:00:38 1999
+++ squid/configure	Sun Aug  8 02:48:57 1999
@@ -99,7 +99,16 @@
                           performance improvement, but may cause problems
                           when used with async I/O.  Truncate uses more
                           filesystem inodes than unlink.."
+ac_help="$ac_help
+  --enable-underscores    Squid by default rejects any host names with _
+                          in their name to conform with internet standars.
+                          If you disagree with this you may allow _ in
+                          hostnames by using this switch, provided that
+                          the resolver library on the host where Squid runs
+                          does not reject _ in hostnames..."
 
+
+
 # Initialize some variables set by options.
 # The variables have the same names as the options, with
 # dashes changed to underlines.
@@ -1475,6 +1484,20 @@
     echo "Enabling truncate instead of unlink"
     cat >> confdefs.h <<\EOF
 #define USE_TRUNCATE 1
+EOF
+
+  fi
+
+fi
+
+
+# Check whether --enable-underscores or --disable-underscores was given.
+if test "${enable_underscores+set}" = set; then
+  enableval="$enable_underscores"
+   if test "$enableval" = "yes" ; then
+    echo "Enabling the use of underscores in host names"
+    cat >> confdefs.h <<\EOF
+#define ALLOW_HOSTNAME_UNDERSCORES 1
 EOF
 
   fi
Index: squid/configure.in
diff -u squid/configure.in:1.1.1.35.2.3 squid/configure.in:1.1.1.35.2.4
--- squid/configure.in:1.1.1.35.2.3	Sat Aug  7 22:36:25 1999
+++ squid/configure.in	Sun Aug  8 02:49:01 1999
@@ -527,6 +527,20 @@
   fi
 ])
 
+dnl Enable underscore in hostnames
+AC_ARG_ENABLE(underscores,
+[  --enable-underscores    Squid by default rejects any host names with _
+                          in their name to conform with internet standars.
+                          If you disagree with this you may allow _ in
+                          hostnames by using this switch, provided that
+                          the resolver library on the host where Squid runs
+                          does not reject _ in hostnames...],
+[ if test "$enableval" = "yes" ; then
+    echo "Enabling the use of underscores in host names"
+    AC_DEFINE(ALLOW_HOSTNAME_UNDERSCORES, 1)
+  fi
+])
+
 # Force some compilers to use ANSI features
 #
 case "$host" in
Index: squid/include/autoconf.h.in
diff -u squid/include/autoconf.h.in:1.1.1.28.2.1 squid/include/autoconf.h.in:1.1.1.28.2.2
--- squid/include/autoconf.h.in:1.1.1.28.2.1	Sat Aug  7 20:00:49 1999
+++ squid/include/autoconf.h.in	Sun Aug  8 02:49:04 1999
@@ -270,6 +270,9 @@
  */
 #undef USE_TRUNCATE
 
+/* Allow _ in hostnames */
+#undef ALLOW_HOSTNAME_UNDERSCORES
+
 /* The number of bytes in a int.  */
 #undef SIZEOF_INT