doc: added dnetview

doc/src/misc/dnetview.md

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+# Dnetview
+
+A simple tui to explore darkfi ircd network topology.
+
+dnetview displays: 
+
+1. all active nodes
+2. outgoing, incoming and manual sessions
+3. each associated connection and recent messages.
+
+dnetview is based on the design-pattern Model, View, Controller. We
+create a logical seperation between the underlying data structure or
+Model; the ui rendering aspect which is the View; and the Controller or
+game engine that makes everything run.
+
+## Install 
+
+```shell
+% git clone https://github.com/darkrenaissance/darkfi 
+% cd darkfi
+% make BINS=dnetview
+```
+
+## Usage
+
+Run dnetview as follows:
+
+```shell
+dnetview -v
+```
+
+On first run, dnetview will create a config file in .config/darkfi. You
+must manually enter the RPC ports of the nodes you want to connect to
+and title them as you see fit.
+
+Dnetview creates a logging file in /tmp/dnetview.log. To see json data
+and other debug info, tail the file like so:
+
+```shell
+tail -f /tmp/dnetview.log
+```
+