Added link to blog post explaining why the flag was added

installer/resources/portable/configs/wrapper.config

@@ -21,6 +21,7 @@ wrapper.java.additional.5.stripquotes=TRUE
 
 # Prevent the JVM from exporting stats (and thereby causing hundreds of
 # ms long pauses during GC)
+# http://www.evanjones.ca/jvm-mmap-pause.html
 wrapper.java.additional.6=-XX:+PerfDisableSharedMem
 
 # PORTABLE installation:

installer/resources/small/wrapper.config

@@ -61,6 +61,7 @@ wrapper.java.additional.4=-Dorg.mortbay.xml.XmlParser.NotValidating=true
 
 # Prevent the JVM from exporting stats (and thereby causing hundreds of
 # ms long pauses during GC)
+# http://www.evanjones.ca/jvm-mmap-pause.html
 wrapper.java.additional.5=-XX:+PerfDisableSharedMem
 
 # Initial Java Heap Size (in MB)

installer/resources/wrapper.config

@@ -81,6 +81,7 @@ wrapper.java.additional.4.stripquotes=TRUE
 
 # Prevent the JVM from exporting stats (and thereby causing hundreds of
 # ms long pauses during GC)
+# http://www.evanjones.ca/jvm-mmap-pause.html
 wrapper.java.additional.5=-XX:+PerfDisableSharedMem
 
 # On some IPv6 enabled systems, I2P and other network-enabled java applications