updated documentation

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 microdnssec, (c) Svenne Krap, 2010
 released under 2-clause BSD-license
 
+Design goals:
+- small
+- few dependencies (bash, bind, ssh)
+- offline (i.e. not having the private-keys on the dns servers)
+
+Limitations (by design):
+- needs bind and ssh-access set up already
+- needs bind set up to include zone.conf (or equivalent) to get managed zones
+- no way to handle unsigned zones
+- no way to handle dns-information (you must be able to provide zonefiles)
+- no secondary dns-server support (but can run as N primaries)
+
+Limitations (to be fixed): 
+- no welcome banner (or version-info) in scripts
+- hardcorded paths (shebangs)
+- script for handling ds-handovers not begun
+
 Before use there are multiple things you need to do:
 1) have one or more servers running bind (9.6.x) you can ssh into 
 2) set up this bind to include an autogenerated file (seczone.conf for example)