Glossary - add some Dash terms

_data/glossary/en/instantsend.yaml

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+---
+# This file is licensed under the MIT License (MIT) available on
+# http://opensource.org/licenses/MIT.
+
+required:
+                                           #-------------40 characters-------------#
+    title_max_40_characters_no_formatting: InstantSend
+
+    summary_max_255_characters_no_formatting: >
+        InstantSend is a service that allows for near-instant transactions.
+        Through this system, inputs can be locked to specific transactions
+        and verified by consensus of the masternode network.
+
+    synonyms_shown_in_glossary_capitalize_first_letter:
+        - InstantSend
+        - InstantX
+        - Transaction Lock
+
+optional:
+    synonyms_and_pluralizations_not_shown_in_glossary:
+
+    not_to_be_confused_with_capitalize_first_letter:
+
+    links_html_or_markdown_style_capitalize_first_letter:
+        - "[InstantSend](/en/developer-guide#instantsend) --- Developer Guide"
+        - "[InstantSend messages](/en/developer-reference#instantsend-messages) --- Developer Reference"
+        - "[InstantSend](https://dashpay.atlassian.net/wiki/spaces/DOC/pages/1146928/InstantSend) --- Official Wiki"
+
+---

_data/glossary/en/masternode.yaml

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+---
+# This file is licensed under the MIT License (MIT) available on
+# http://opensource.org/licenses/MIT.
+
+required:
+                                           #-------------40 characters-------------#
+    title_max_40_characters_no_formatting: Masternode
+
+    summary_max_255_characters_no_formatting: >
+        A computer that provides second-tier Dash functionality (InstantSend,
+        PrivateSend, decentralized governance). Masternodes are incentivized by
+        receiving part of the block reward, but must hold 1000 Dash as
+        collateral to prevent sybil attacks.
+
+    synonyms_shown_in_glossary_capitalize_first_letter:
+        - Masternode
+
+optional:
+    synonyms_and_pluralizations_not_shown_in_glossary:
+        - Masternodes
+        - masternodes
+
+    not_to_be_confused_with_capitalize_first_letter:
+
+    links_html_or_markdown_style_capitalize_first_letter:
+        - "[Masternode Payment](/en/developer-guide#masternode-payment) --- Developer Guide"
+        - "[Masternode Sync](/en/developer-guide#masternode-sync) --- Developer Guide"
+        - "[Governance](/en/developer-guide#governance) --- Developer Guide"
+        - "[Masternode messages](/en/developer-reference#masternode-messages) --- Developer Reference"
+        - "[Masternode](https://dashpay.atlassian.net/wiki/spaces/DOC/pages/1146920/Masternode+Network) --- Official Wiki"
+
+---

_data/glossary/en/privatesend.yaml

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+---
+# This file is licensed under the MIT License (MIT) available on
+# http://opensource.org/licenses/MIT.
+
+required:
+                                           #-------------40 characters-------------#
+    title_max_40_characters_no_formatting: PrivateSend
+
+    summary_max_255_characters_no_formatting: >
+        PrivateSend is a masternode managage, decentralized mixer for creating
+        an on-demand system of removing the history from coins on the network.
+        PrivateSend mixes inputs while allowing each participant to retain
+        control of their coins at all times so the process can be done without
+        trusting a third party.
+
+    synonyms_shown_in_glossary_capitalize_first_letter:
+        - PrivateSend
+
+optional:
+    synonyms_and_pluralizations_not_shown_in_glossary:
+
+    not_to_be_confused_with_capitalize_first_letter:
+
+    links_html_or_markdown_style_capitalize_first_letter:
+        - "[PrivateSend](/en/developer-guide#privatesend) --- Developer Guide"
+        - "[PrivateSend messages](/en/developer-reference#privatesend-messages) --- Developer Reference"
+        - "[PrivateSend](https://dashpay.atlassian.net/wiki/spaces/DOC/pages/1146924/PrivateSend) --- Official Wiki"
+
+---

_data/glossary/en/spork.yaml

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+---
+# This file is licensed under the MIT License (MIT) available on
+# http://opensource.org/licenses/MIT.
+
+required:
+                                           #-------------40 characters-------------#
+    title_max_40_characters_no_formatting: Spork, Multi-Phased Fork
+
+    summary_max_255_characters_no_formatting: >
+        A spork is a mechanism unique to Dash used to safely deploy
+        new features to the network through network-level variables
+        to avoid the risk of unintended network forking during upgrades.
+
+    synonyms_shown_in_glossary_capitalize_first_letter:
+        - Spork
+        - Multi-Phased fork
+
+optional:
+    synonyms_and_pluralizations_not_shown_in_glossary:
+        - sporks
+        - multi-phased fork
+
+    not_to_be_confused_with_capitalize_first_letter:
+        - Fork (a regular fork where all nodes follow the same consensus rules, so the fork is resolved once one chain has more proof of work than another)
+        - Hard fork (a permanent divergence in the block chain caused by non-upgraded nodes not following new consensus rules)
+        - Software fork (when one or more developers permanently develops a codebase separately from other developers)
+        - Git fork (when one or more developers temporarily develops a codebase separately from other developers
+
+    links_html_or_markdown_style_capitalize_first_letter:
+        - "[Spork message](/en/developer-reference#spork) --- Developer Reference"
+        - "[Multi-Phased Fork (Spork)](https://dashpay.atlassian.net/wiki/spaces/DOC/pages/19169298/Multi-Phased+Fork+Spork) --- Official Wiki"
+        - "[Understanding Sporks](https://dashpay.atlassian.net/wiki/spaces/DOC/pages/128319489/Understanding+Sporks) --- Official Wiki"
+
+---