Tweaks for release.

Change-Id: I0be8296347dafcfe14ee9168dd4bb3bdc40a81a5

CHANGELOG

@@ -1,3 +1,12 @@
+2017-10-01 Changes in burp-2.1.20:
+  * On server daemonise(), rewrite the pid/prog to the lockfile
+    without trying to open it a second time. This should avoid permission
+    problems after chuser/chgrp.
+  * Fix for 'success notification on failed backup'.
+  * Check fileno() for errors in asfd.c.
+  * List the mtime instead of the more recent of mtime/ctime.
+  * Fix client_lockdir option.
+
 2017-09-01 Changes in burp-2.1.18:
   * From qm2k:
     - Fix buffer overrun and slightly refactor xstrsplit in glob_windows.c

DONATIONS

@@ -7,6 +7,11 @@ me via the website contact page and we can talk about alternatives.
 
 This is the list of donations received to date. Many thanks to all of you.
 
+Donations for 2017-09:
+ *     £100.00 Romain L.
+ *      £40.00 Marcin W.
+ *      £30.00 Pablo D.
+
 Donations for 2017-08:
  *     £100.00 Romain L.
  *      £50.00 Holger B.

configure.ac

@@ -3,7 +3,7 @@ dnl Process this file with autoconf to produce a configure script.
 dnl require a recent autoconf
 AC_PREREQ([2.61])
 
-AC_INIT([Burp],[2.1.18],[https://github.com/grke/burp/issues],[burp],[http://burp.grke.net/])
+AC_INIT([Burp],[2.1.20],[https://github.com/grke/burp/issues],[burp],[http://burp.grke.net/])
 AC_CONFIG_AUX_DIR([autoconf])
 AC_CONFIG_HEADERS([src/config.h])
 AC_CONFIG_MACRO_DIR([m4])