cupsctl: add page

pages/common/cupsctl.md

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+# cupsctl
+
+> Update or query a server's cupsd.conf.
+> More information: <https://www.cups.org/doc/man-cupsctl.html>.
+
+- Display current configuration values:
+
+`cupsctl`
+
+- Display the configuration values of a specific server:
+
+`cupsctl -h {{server[:port]}}`
+
+- Display current configuration values [E]ncrypting the connection to the scheduler:
+
+`cupsctl -E`
+
+- Enable or disable debug logging to the error_log file:
+
+`cupsctl --debug-logging|--no-debug-loging`
+
+- Enable or disable remote administration:
+
+`cupsctl --remote-admin|--no-remote-admin`
+
+- Parse the current debug logging state:
+
+`cupsctl | grep '^_debug_logging' | awk -F= '{print $2}'`