SLING-7660 - LogManager configuration "Number of Log Files" limited to 20

- add warning to metatype description
diff --git a/src/main/resources/OSGI-INF/l10n/metatype.properties b/src/main/resources/OSGI-INF/l10n/metatype.properties
index a938f65..6a1dc84 100644
--- a/src/main/resources/OSGI-INF/l10n/metatype.properties
+++ b/src/main/resources/OSGI-INF/l10n/metatype.properties
@@ -40,7 +40,9 @@
  how many generations (incl. the active log file) should be kept. This is a \
  positive numeric value. The default value is 5. If the Log File Threshold property \
  specifies time/date controlled log file rotation, log file deletion can be disabled \
- by setting the number of log files to '0'.
+ by setting the number of log files to '0'. Warning: setting this to a high number \
+ (more than 20) may be expensive on some file-systems, because all files need to be \
+  renamed when log files are rotated.
 log.file.size.name = Log File Threshold
 log.file.size.description = Controls the rotation of the log file by setting \
  a maximum file size or a time/date schedule at which to rotate the log file. \