Content - Add glossary entries

- ChainLock, LLMQ, Special Tx

_data/glossary/en/chainlocks.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: ChainLocks
+
+    summary_max_255_characters_no_formatting: >
+        ChainLocks are a feature enabling near instant consensus
+        on the valid chain. ChainLocks use  Long-Living Masternode
+        Quroums to mitigate 51 percent attacks and reduce
+        uncertainty when receiving funds.
+
+    synonyms_shown_in_glossary_capitalize_first_letter:
+        - ChainLocks
+
+optional:
+    synonyms_and_pluralizations_not_shown_in_glossary:
+        - ChainLock
+
+    not_to_be_confused_with_capitalize_first_letter:
+
+    links_html_or_markdown_style_capitalize_first_letter:
+        - "[ChainLocks](/en/developer-guide#chainlocks) --- Developer Guide"
+        - "[ChainLock message](/en/developer-reference#clsig) --- Developer Reference"
+        - "[ChainLocks](https://docs.dash.org/en/stable/introduction/features.html#chainlocks) --- Dash Documentation"
+
+---

_data/glossary/en/long-living-masternode-quorum.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: Long-Living Masternode Quorum
+
+    summary_max_255_characters_no_formatting: >
+        Long-Living Masternode Quorums (LLMQs) are a Dash innovation
+        that enable masternodes to perform threshold signing of
+        consensus-related messages (e.g. InstantSend transactions).
+        LLMQs provide a more scalable, general use quorum system
+        than the ephemeral ones used prior to Dash Core version 0.14.
+
+    synonyms_shown_in_glossary_capitalize_first_letter:
+        - Long-Living Masternode Quorum
+        - LLMQ
+
+optional:
+    synonyms_and_pluralizations_not_shown_in_glossary:
+        - Long-Living Masternode Quorums
+        - Long Living Masternode Quorum
+        - Long Living Masternode Quorums
+        - LLMQs
+
+    not_to_be_confused_with_capitalize_first_letter:
+
+    links_html_or_markdown_style_capitalize_first_letter:
+        - "[Masternode Quorums](/en/developer-guide#masternode-quorums) --- Developer Guide"
+        - "[Long-Living Masternode Quorums](https://github.com/dashpay/dips/blob/master/dip-0006.md) --- Dash DIP"
+
+---

_data/glossary/en/special-transactions.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: Special Transactions
+
+    summary_max_255_characters_no_formatting: >
+        Special Transactions provide a way to include non-financial,
+        consensus-assisting metadata (e.g. masternode lists) on-chain.
+
+    synonyms_shown_in_glossary_capitalize_first_letter:
+      - Special Transactions
+
+optional:
+    synonyms_and_pluralizations_not_shown_in_glossary:
+        - Special Transaction
+        - special transaction
+        - special transactions
+
+    not_to_be_confused_with_capitalize_first_letter:
+
+    links_html_or_markdown_style_capitalize_first_letter:
+        - "[Special Transactions](/en/developer-reference#special-transactions) --- Developer Reference"
+        - "[Special Transactions](https://github.com/dashpay/dips/blob/master/dip-0002.md) --- Dash DIP"
+
+---