produce incorrect results for ROUND() 

Added a workaround and a configure check to test whether 
isinf() is affected by the GCC bug #39228. 
       
Since no code in MySQL server is currently affected by that 
bug, the patch is actually a safeguard for possible future 
code modifications. No test cases or changelog entries are 
needed. 


configure.in:
  Added a configure check to test whether isinf() is safe to use
  in C code.
include/my_global.h:
  Added a workaround for GCC bug #39228.

fix for 29125).

Antony Dovgal <tony @ daylessday.org> .  SCA signed and faxed to
tel:+1-408-715-2540.  Patches tweaked by Chad.

continue to update it at make-time.

One shouldn't need to run "make" on server source to get the stuff we say
plugins should use.

functions
      
Unknown timezone specifications are properly rejected
by the server, but are copied into tz_storage before
rejection, and hence is retained until end of server 
life. With sufficiently large bogus timezone specs, 
it is easy to exhaust system memory.
      
Allocation of memory for a copy of the timezone
name is delayed until after verification of validity,
at the cost of a memcpy of the timezone info. This 
only happens once, future lookups will hit the cached
structure.

for bug #41486. Session max_allowed_packet is read-only
as of MySQL 5.1.31. In addition, the global variable
now has no effect on the current session.

fixed help message


client/mysql.cc:
  fixed help message

Don't throw an error after checking the first and the second arguments.
Continue with checking the third and higher arguments and if some of
them is stronger according to coercibility rules,
then this argument's collation is set as result collation.


mysql-test/r/ctype_collate.result:
  test result
mysql-test/t/ctype_collate.test:
  test case
sql/item.cc:
  Don't throw an error after checking the first and the second arguments.
  Continue with checking the third and higher arguments and if some of
  them is stronger according to coercibility rules,
  then this argument's collation is set as result collation.

                        
When loading dump created by mysqldump tool an error is
thrown saying storage engine for the table doesn't have 
an option.
                        
mysqldump tries to re-insert the data into the federated
table which causes the error. Since the data is already
available on the remote server, mysqldump shouldn't try
to dump the data again for FEDERATED tables.
                        
As stated in the bug page, it can be considered similar
to the MERGE ENGINE with "view only" nature.
                        
Fixed by adding the "FEDERATED ENGINE" to the exception
list to ignore the data.

client/mysqldump.c:
  Fixed check_if_ignore_table() to ignore FEDERATED engine
  when dumping the table data.
mysql-test/r/federated.result:
  Result file for BUG#21360
mysql-test/t/federated.test:
  Testcase for BUG#21360

smarter, and according to a contributer, it is necessary for plugin authors
using "--with-debug".