diff --git a/apps/restconf/README b/apps/restconf/README
index 5d3cd435..8d750288 100644
--- a/apps/restconf/README
+++ b/apps/restconf/README
@@ -1,19 +1,26 @@
+Clixon Restconf
+===============
+
+Contents:
+1. Features
+2. Installation using NGINX
+3. Debugging
+
+1. FEATURES
++++++++++++
+Clixon restconf is a daemon based on FASTCGI. Instructions are available to
+run with NGINX. 
+The implementatation supports plain OPTIONS, HEAD, GET, POST, PUT, PATCH, DELETE.
+and is based on draft-ietf-netconf-restconf-13. 
+There is currently (2017) a RFC 8040, many of those features are _not_ implemented,
+including:
+- query parameters (section 4.9)
+- notifications (sec 6)
+- only rudimentary error reporting exists (sec 7)
+
+2. INSTALLATION using NGINX
++++++++++++++++++++++++++++
 
-# Existing clixon installation. Using CLI:
-olof@vandal> clixon_cli -f /usr/local/etc/routing.conf
-olof@vandal> show configuration
-interfaces {
-  interface {
-    name eth0;
-    type eth;
-    enabled true;
-  }
-  interface {
-    name eth9;
-    type eth;
-    enabled true;
-  }
-}
 # Define nginx config file/etc/nginx/sites-available/default
 server {
   ...
@@ -57,8 +64,8 @@ olof@vandal> curl -G http://127.0.0.1/restconf/data/interfaces/interface/name=et
 curl -sX POST -d '{"clicon":{"interfaces":{"interface":{"name":"eth1","type":"eth","enabled":"true"}}}}' http://localhost/restconf/data
 
 
-Debugging
----------
+3. DEBUGGING
+++++++++++++
 Start the restconf programs with debug flag:
 sudo su -c "/www-data/clixon_restconf -D" -s /bin/sh www-data
 
diff --git a/lib/src/clixon_json_parse.l b/lib/src/clixon_json_parse.l
index 86c46917..64ce04ae 100644
--- a/lib/src/clixon_json_parse.l
+++ b/lib/src/clixon_json_parse.l
@@ -131,11 +131,7 @@ int
 json_scan_exit(struct clicon_json_yacc_arg *jy)
 {
     yy_delete_buffer(jy->jy_lexbuf);
-#if defined(YY_FLEX_SUBMINOR_VERSION) && YY_FLEX_SUBMINOR_VERSION >= 9
     clixon_json_parselex_destroy();  /* modern */
-#else
-    yy_init = 1;      /* This does not quite free all buffers */
-#endif
     return 0;
 }
 
diff --git a/lib/src/clixon_xml_parse.l b/lib/src/clixon_xml_parse.l
index 4797b257..3192d035 100644
--- a/lib/src/clixon_xml_parse.l
+++ b/lib/src/clixon_xml_parse.l
@@ -141,11 +141,7 @@ int
 clixon_xml_parsel_exit(struct xml_parse_yacc_arg *ya)
 {
    yy_delete_buffer(ya->ya_lexbuf);
-#if defined(YY_FLEX_SUBMINOR_VERSION) && YY_FLEX_SUBMINOR_VERSION >= 9
    clixon_xml_parselex_destroy();  /* modern */
-#else
-    yy_init = 1;      /* This does not quite free all buffers */
-#endif
 
   return 0;
 }
diff --git a/lib/src/clixon_yang_parse.l b/lib/src/clixon_yang_parse.l
index 885cc708..a19328b5 100644
--- a/lib/src/clixon_yang_parse.l
+++ b/lib/src/clixon_yang_parse.l
@@ -248,11 +248,7 @@ int
 yang_scan_exit(struct clicon_yang_yacc_arg *yy)
 {
     yy_delete_buffer(yy->yy_lexbuf);
-#if defined(YY_FLEX_SUBMINOR_VERSION) && YY_FLEX_SUBMINOR_VERSION >= 9
     clixon_yang_parselex_destroy();  /* modern */
-#else
-    yy_init = 1;      /* This does not quite free all buffers */
-#endif
     return 0;
 }