* Set access/subscribe base URL with: CLICON_STREAM_URL_PREFIX (default https\

://localhost/streams).
    * Example: new stream "foo" will get access URL: https://localhost/streams/\
foo
  * Optional pub/sub support enabled by ./configure --enable-publish
    * Set publish URL base with: CLICON_STREAM_PUB_PREFIX (default http://local\
host/pub)
    * Example: new stream "foo" will get pub URL: https://localhost/pub/foo

configure

@@ -686,7 +686,6 @@ infodir
 docdir
 oldincludedir
 includedir
-runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -711,6 +710,7 @@ ac_user_opts='
 enable_option_checking
 enable_debug
 with_cligen
+enable_publish
 with_restconf
 with_configfile
 '
@@ -763,7 +763,6 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
-runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE}'
@@ -1016,15 +1015,6 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
-  -runstatedir | --runstatedir | --runstatedi | --runstated \
-  | --runstate | --runstat | --runsta | --runst | --runs \
-  | --run | --ru | --r)
-    ac_prev=runstatedir ;;
-  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
-  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
-  | --run=* | --ru=* | --r=*)
-    runstatedir=$ac_optarg ;;
-
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1162,7 +1152,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir runstatedir
+		libdir localedir mandir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1315,7 +1305,6 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
-  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -1349,6 +1338,8 @@ Optional Features:
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --enable-debug          Build with debug symbols, default: no
+  --enable-publish        Enable publish of notification streams using SSE and
+                          curl
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -2195,6 +2186,7 @@ _ACEOF
 
 
 
+# AC_SUBST(var) makes @var@ appear in makefiles.
 # clixon versions spread to Makefile's (.so files) and variable in build.c
 
 
@@ -3687,6 +3679,77 @@ if test "${with_cligen}"; then
   test -d "$with_cligen" && CLIGEN_PREFIX="$with_cligen"
 fi
 
+# Experimental: Curl publish notification stream to eg Nginx nchan.
+# Check whether --enable-publish was given.
+if test "${enable_publish+set}" = set; then :
+  enableval=$enable_publish;
+	  if test "$enableval" = no; then
+	      ac_enable_publish=no
+	  else
+	      ac_enable_publish=yes
+          fi
+
+else
+   ac_enable_publish=no
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: publish is $ac_enable_publish" >&5
+$as_echo "publish is $ac_enable_publish" >&6; }
+
+if test "$ac_enable_publish" = "yes"; then
+   # publish streams uses libcurl
+   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for curl_global_init in -lcurl" >&5
+$as_echo_n "checking for curl_global_init in -lcurl... " >&6; }
+if ${ac_cv_lib_curl_curl_global_init+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lcurl  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char curl_global_init ();
+int
+main ()
+{
+return curl_global_init ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_curl_curl_global_init=yes
+else
+  ac_cv_lib_curl_curl_global_init=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_curl_curl_global_init" >&5
+$as_echo "$ac_cv_lib_curl_curl_global_init" >&6; }
+if test "x$ac_cv_lib_curl_curl_global_init" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBCURL 1
+_ACEOF
+
+  LIBS="-lcurl $LIBS"
+
+else
+  as_fn_error $? "libcurl missing" "$LINENO" 5
+fi
+
+
+$as_echo "#define CLIXON_PUBLISH_STREAMS 1" >>confdefs.h
+
+fi
+
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
 $as_echo_n "checking for grep that handles long lines and -e... " >&6; }