clamdscan: add page (#6877)

pages/common/clamdscan.md

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+# clamdscan
+
+> A command-line virus scanner using the ClamAV Daemon.
+> More information: <https://www.clamav.net>.
+
+- Scan a file or directory for vulnerabilities:
+
+`clamdscan {{path/to/file_or_directory}}`
+
+- Scan data from stdin:
+
+`{{command}} | clamdscan -`
+
+- Scan the current directory and output only infected files:
+
+`clamdscan --infected`
+
+- Output the scan report to a log file:
+
+`clamdscan --log {{path/to/log_file}}`
+
+- Move infected files to a specific directory:
+
+`clamdscan --move {{path/to/quarantine_directory}}`
+
+- Remove infected files:
+
+`clamdscan --remove`
+
+- Use multiple threads to scan a directory:
+
+`clamdscan --multiscan`
+
+- Pass the file descriptor instead of streaming the file to the daemon:
+
+`clamdscan --fdpass`