add start9 guide

.gitignore

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+.DS_Store

LICENSE

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+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <https://unlicense.org>

README.md

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+How to disable datacarrier on Bitcoin Knots.
+=============
+
+What is `datacarrier`?
+---------------------
+
+Datacarrier ...
+
+How to disable datacarrier on my platform?
+------
+
+ - [Umbrel](page/umbrel.md)
+ - [Start9](page/start9.md)
+ -
+ -

page/start9.md

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+How to disable datacarrier on Start9.
+===
+
+1. Login to your start9 server.
+2. Click on `Bitcoin Knots` -> `Config`.
+<img src="pictures/1-start9.png" width="50%" height="50%" />
+3. Under the `Mempool` section uncheck `Datacarrier`.
+<img src="pictures/2-start9.png" width="50%" height="50%" />
+4. Click on the `Save` button.
+
+Bitcoin Knots will automatically restart and the change will be done!