hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/GCMultipleMergedRegionsProcedure.java
Edit a log.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/HBCKServerCrashProcedure.java
Add override of isMatchingRegionLocation. Allow 'null' as a pass in
HBCKSCP.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ServerCrashProcedure.java
Add a method for HBCKSCP to override and be less strict filtering
assigns.
hbase-server/src/main/resources/hbase-webapps/master/hbck.jsp
Some doc on what 'Unknown Servers' are.