Make all replication variables changeable without server restart.

This requires some work as there is many variables and some variables require
more work than others.

Here follows a list of all the replication variables.
We need to make this in priority order for what should be made changeable.

auto-increment-increment
auto-increment-offset
binlog-annotate-rows-events
binlog-direct-non-transactional-updates
binlog-do-db
binlog-ignore-db
binlog-row-event-max-size
binlog_cache_size
binlog_format
disconnect-slave-event-count
init-rpl-role
init-slave
log-bin
log-bin-index
log-bin-trust-function-creators
log-bin-trust-routine-creators
master-host
master-info-file
master-password
master-port
master-retry-count
master-ssl
master-ssl-ca
master-ssl-capath
master-ssl-cert
master-ssl-cipher
master-ssl-key
master-user
max-binlog-dump-events
max-relay-log-size
relay-log
relay-log-index
relay-log-info-file
relay_log_purge
relay_log_space_limit
replicate-annotate-rows-events
replicate-do-db
replicate-do-table
replicate-ignore-db
replicate-ignore-table
replicate-rewrite-db
replicate-same-server-id
replicate-wild-do-table
replicate-wild-ignore-table
report-host
report-password
report-port
report-user
rpl-recovery-rank
server-id
slave-exec-mode
slave-load-tmpdir
slave-skip-errors
slave_compressed_protocol
slave_net_timeout
slave_transaction_retries

Observers changed: Sergei

High Level Description modified.
--- /tmp/wklog.210.old.28499	2011-06-30 15:26:05.000000000 +0000
+++ /tmp/wklog.210.new.28499	2011-06-30 15:26:05.000000000 +0000
@@ -3,7 +3,63 @@
 This requires some work as there is many variables and some variables require
 more work than others.
 
-Here we will list the variables in priority order that should be made changeable.
-
+Here follows a list of all the replication variables.
+We need to make this in priority order for what should be made changeable.
 
+auto-increment-increment
+auto-increment-offset
+binlog-annotate-rows-events
+binlog-direct-non-transactional-updates
+binlog-do-db
+binlog-ignore-db
+binlog-row-event-max-size
+binlog_cache_size
+binlog_format
+disconnect-slave-event-count
+init-rpl-role
+init-slave
+log-bin
+log-bin-index
+log-bin-trust-function-creators
+log-bin-trust-routine-creators
+master-host
+master-info-file
+master-password
+master-port
+master-retry-count
+master-ssl
+master-ssl-ca
+master-ssl-capath
+master-ssl-cert
+master-ssl-cipher
+master-ssl-key
+master-user
+max-binlog-dump-events
+max-relay-log-size
+relay-log
+relay-log-index
+relay-log-info-file
+relay_log_purge
+relay_log_space_limit
+replicate-annotate-rows-events
+replicate-do-db
+replicate-do-table
+replicate-ignore-db
+replicate-ignore-table
+replicate-rewrite-db
+replicate-same-server-id
+replicate-wild-do-table
+replicate-wild-ignore-table
+report-host
+report-password
+report-port
+report-user
+rpl-recovery-rank
+server-id
+slave-exec-mode
+slave-load-tmpdir
+slave-skip-errors
+slave_compressed_protocol
+slave_net_timeout
+slave_transaction_retries