cups-config, cupsd, lpinfo: add page (#6623)

pages/common/cups-config.md

@@ -0,0 +1,24 @@
+# cups-config
+
+> Show technical information about your CUPS print server installation.
+> More information: <https://www.cups.org/doc/man-cups-config.html>.
+
+- Show the currently installed version of CUPS:
+
+`cups-config --version`
+
+- Show where CUPS is currently installed:
+
+`cups-config --serverbin`
+
+- Show the location of CUPS' configuration directory:
+
+`cups-config --serverroot`
+
+- Show the location of CUPS' data directory:
+
+`cups-config --datadir`
+
+- Display all available options:
+
+`cups-config --help`