Manual pages (#1346)

* Add manual pages

Generate manual pages from the README and extend README with Name and
Description sections.

The generation requires 'ronn' which may not be available. Just check in
all generated manual pages.

man/coredns-root.7

@@ -0,0 +1,37 @@
+.\" generated with Ronn/v0.7.3
+.\" http://github.com/rtomayko/ronn/tree/0.7.3
+.
+.TH "COREDNS\-ROOT" "7" "January 2018" "CoreDNS" "CoreDNS plugins"
+.
+.SH "NAME"
+\fIroot\fR \- simply specifies the root of where to find (zone) files\.
+.
+.SH "DESCRIPTION"
+The default root is the current working directory of CoreDNS\. The \fIroot\fR plugin allows you to change this\. A relative root path is relative to the current working directory\.
+.
+.SH "SYNTAX"
+.
+.nf
+
+root PATH
+.
+.fi
+.
+.P
+\fBPATH\fR is the directory to set as CoreDNS\' root\.
+.
+.SH "EXAMPLES"
+Serve zone data (when the \fIfile\fR plugin is used) from \fB/etc/coredns/zones\fR:
+.
+.IP "" 4
+.
+.nf
+
+\&\. {
+    root /etc/coredns/zones
+}
+.
+.fi
+.
+.IP "" 0
+