Update cheatsheets

http

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# http
+
+> HTTPie: HTTP client, aims to be easier to use than cURL.
+> More information: <https://httpie.org>.
+
+- Download a URL to a file:
+
+`http --download {{example.org}}`
+
+- Send form-encoded data:
+
+`http --form {{example.org}} {{name='bob'}} {{profile_picture@'bob.png'}}`
+
+- Send JSON object:
+
+`http {{example.org}} {{name='bob'}}`
+
+- Specify an HTTP method:
+
+`http {{HEAD}} {{example.org}}`
+
+- Include an extra header:
+
+`http {{example.org}} {{X-MyHeader:123}}`
+
+- Pass a username and password for server authentication:
+
+`http --auth {{username:password}} {{example.org}}`
+
+- Specify raw request body via `stdin`:
+
+`cat {{data.txt}} | http PUT {{example.org}}`