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-bind.7

@@ -0,0 +1,37 @@
+.\" generated with Ronn/v0.7.3
+.\" http://github.com/rtomayko/ronn/tree/0.7.3
+.
+.TH "COREDNS\-BIND" "7" "January 2018" "CoreDNS" "CoreDNS plugins"
+.
+.SH "NAME"
+\fIbind\fR \- overrides the host to which the server should bind\.
+.
+.SH "DESCRIPTION"
+Normally, the listener binds to the wildcard host\. However, you may force the listener to bind to another IP instead\. This directive accepts only an address, not a port\.
+.
+.SH "SYNTAX"
+.
+.nf
+
+bind ADDRESS
+.
+.fi
+.
+.P
+\fBADDRESS\fR is the IP address to bind to\.
+.
+.SH "EXAMPLES"
+To make your socket accessible only to that machine, bind to IP 127\.0\.0\.1 (localhost):
+.
+.IP "" 4
+.
+.nf
+
+\&\. {
+    bind 127\.0\.0\.1
+}
+.
+.fi
+.
+.IP "" 0
+