initial checkin of manuals to public repo

The manuals existed in different form for several years in an internal
sysmocom repository.  However, since they had just recently been
converted from docboox-xml to asciidoc and all files have been
re-shuffled for enabling the public release, there's not much point in
keeping the history with git-filter-branch.
diff --git a/doc/manuals/Makefile b/doc/manuals/Makefile
new file mode 100644
index 0000000..f742e07
--- /dev/null
+++ b/doc/manuals/Makefile
@@ -0,0 +1,41 @@
+# XSL stylesheets downloaded from http://docbook.sourceforge.net/release/xsl/current/html/
+# Makefile from BitBake/OpenEmbedded manuals
+
+EXTRA_DEPS = gen-vty-docbook
+
+topdir = .
+pcu_reference = $(topdir)/osmopcu-vty-reference.xml
+manuals = $(bts_manual) $(pcu_reference)
+# types = pdf txt rtf ps xhtml html man tex texi dvi
+# types = pdf txt
+types = $(docbooktotypes)
+docbooktotypes = pdf
+# htmlcssfile =
+# htmlcss =
+
+TOPDIR := ..
+ASCIIDOCS := osmopcu-usermanual
+
+include $(TOPDIR)/build/Makefile.asciidoc.inc
+include $(TOPDIR)/build/Makefile.inc
+
+osmopcu-usermanual.pdf: chapters/*.adoc
+
+clean:
+	rm -rf $(cleanfiles)
+	rm -rf gen-vty-docbook
+
+gen-vty-docbook: FORCE
+	$(call command,xsltproc -o generated/combined1.xml \
+		--stringparam with $(PWD)/../common/vty_additions.xml \
+		$(MERGE_DOC) vty/osmo-pcu_vty_reference.xml, \
+		XSLTPROC,Merging Common VTY)
+	$(call command,xsltproc -o generated/combined2.xml \
+		--stringparam with $(PWD)/vty/osmo-pcu_vty_additions.xml \
+		$(MERGE_DOC) generated/combined1.xml, \
+		XSLTPROC,Merging PCU VTY)
+	$(call command,xsltproc ../vty_reference.xsl generated/combined2.xml > generated/docbook_vty.xml, \
+		XSLTPROC,Converting PCU VTY to DocBook)
+
+
+