Move pages under tldr, lint run.sh, update docs

tldr/keepass2

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# keepass2
+
+> A light-weight password manager.
+> More information: <https://keepass.info>.
+
+- Start KeePass 2, opening the most recently opened password database:
+
+`keepass2`
+
+- Start KeePass 2, opening a specific password database:
+
+`keepass2 {{path/to/database.kbdx}}`
+
+- Use a specific key file to open a password database:
+
+`keepass2 {{path/to/database.kbdx}} -keyfile:{{path/to/key/file.key}}`