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

tldr/spfquery

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# spfquery
+
+> Query Sender Policy Framework records to validate e-mail senders.
+> More information: <https://www.libspf2.org/>.
+
+- Check if an IP address is allowed to send an e-mail from the specified e-mail address:
+
+`spfquery -ip {{8.8.8.8}} -sender {{sender@example.com}}`
+
+- Turn on debugging output:
+
+`spfquery -ip {{8.8.8.8}} -sender {{sender@example.com}} --debug`