DynamicLoggingCategory: improve documentation

src/util/dynamicloggingcategory.h

@@ -5,10 +5,12 @@
 
 /// DynamicLoggingCategory is a wrapper around QLoggingCategory
 /// that facilitates using a QLoggingCategory for a category
-/// name string that is determined at run time. If the category
-/// name is fully known at compile time, simply construct a
-/// QLoggingCategory with a string literal instead of using
-/// DynamicLoggingCategory.
+/// name string that is determined at run time. To use a
+/// DynamicLoggingCategory, simply pass it to the
+/// qCInfo, qCDebug, qCWarning, or qCCritical macros like a
+/// QLoggingCategory. If the category name is fully known at
+/// compile time, simply construct a QLoggingCategory with a
+/// string literal instead of using DynamicLoggingCategory.
 ///
 /// DynamicLoggingCategory stores the logging category name as a
 /// QByteArray. This is helpful because QLoggingCategory has a deleted