replication updates in the manual

fixed typo on sql_repl.cc
added build-tags script for the benefit of the poor, sick, and afflicted, 
as Matt likes to say :-)

build-tags

+#! /bin/sh
+
+if [ ! -f configure.in ] ; then
+ echo "$0 must be run from MySQL source root"
+ exit 1
+fi
+
+rm -f TAGS
+find -not -path \*SCCS\* -and \
+ \( -name \*.cc -or -name \*.h -or -name \*.yy -or -name \*.c \) \
+ -print -exec etags -o TAGS --append {} \; 

sql/sql_repl.cc

@@ -609,7 +609,7 @@ int stop_slave(THD* thd, bool net_report )
     thd->proc_info = "waiting for slave to die";
     while(slave_running)
     {
-      /* there is a small change that slave thread might miss the first
+      /* there is a small chance that slave thread might miss the first
 	 alarm. To protect againts it, resend the signal until it reacts
       */