ignore 'INDIVIDUAL BUFFER POOL INFO' section in MySQL 5.5

If you set innodb_buffer_pool_instances to a value greater than 1 the status
will show a new section with details about each buffer pool instance.
I think the details a currently not needed so just ignore the section.
fix parsing file io for MySQL 5.5

In MySQL 5.5 the innodb status shows additionally aio reads and aio writes for
each thread in square brackets.
fix parsing insert_buffer_and_adaptive_hash_index for MySQL 5.5

Closes munin trac ticket #1355.
fix Use of uninitialized value in printf

This fixes the case you have activated mysql_replication plugin but don't have
replication enabled in MySQL.
Without this you see the following error messages:
Use of uninitialized value in printf at /etc/munin/plugins/mysql_replication line 885
MRG: from https://github.com/cloos/munin.git branch: mysql-5.5-compatibility
Break mysql innodb data on full sections

Patch from Jan Mara
https://github.com/jmara/ubuntu-munin-mysql/commit/77ae2b2d8bc1233e0f0b0e6346d66b955441ba14
Fix spelling in mysql plugin for warning
Fix name of slave variables and initialize other variables in case slave isnt active
Capture a bit more information for mysql-5.5+ on innodb status
Merge branch 'mysql-5.5-for-merge' of github.com:openquery/munin-upstream into mysql-5.5-for-merge
add icp - index condition pushdown
Multi Range Read optimizations
add subquery_cache status to query cache graph
Performance schema losses
mysql plugin - separate out table and file graphs
Mariadb-10 show innodb status compatiblity

show innodb status on mariadb-10 if in a transaction will show

--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
1 read views open inside InnoDB
1 RW transactions active inside InnoDB
0 RO transactions active inside InnoDB
1 out of 1000 descriptors used
---OLDEST VIEW---
Normal read view
Read view low limit trx n:o 726056894
Read view up limit trx id 726056894
Read view low limit trx id 726056894
Read view individually stored trx ids:
-----------------
Main thread process no. 13048, id 140163878000384, state: sleeping
Number of rows inserted 0, updated 0, deleted 0, read 1666121005
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 17566.53 reads/s
------------

In this patch we just skip sections like "Main thread process.." that we
don't know about.
DERIVE not GAUGE for mrr and icp graphs
innodb_open_files as AREA on graph tables
remove calling $section_map{$sec}->(); twice
Merge remote branch 'pull/160' into devel

Conflicts:
	plugins/node.d/mysql_.in