Change version to 0.11 and document the changes.

CHANGES

@@ -1,3 +1,10 @@
+btpd 0.11:
+----------
+
+Bug fixes:
+- A file descriptor was closed too early, which could cause btpd to exit
+  with an error message on systems using epoll.
+
 btpd 0.10:
 ----------
 

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT(btpd, 0.10, btpd@murmeldjur.se)
+AC_INIT(btpd, 0.11, btpd@murmeldjur.se)
 
 AM_INIT_AUTOMAKE([foreign])