README.md: Update user manual section; we now have one.

Change-Id: I2137a7b25c5d0a8f198a32e1ffcbe07962b3f469
---
M README.md
1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 0569753..40b8226 100644
--- a/README.md
+++ b/README.md
@@ -36,8 +36,11 @@
 Documentation
 -------------
 
-Once the project reaches a usable milestone, we will be working on a
-user manual.  Stay tuned.
+The User Manual is [optionally] built in PDF form as part of the build process, its asciidoc
+source can be found in the `docs/manuals` sub-directory.
+
+Pre-rendered PDF version of the current "master" can be found at
+[User Manual](https://ftp.osmocom.org/docs/osmo-epdg/master/osmoepdg-usermanual.pdf).
 
 
 Contributing

