When compiling with debug, don't clear buffer in 'net_clear()'
- This allows us to easier find bugs in the protocol and also get repeatable test failures in test cases where someone forgot to do --reap

client/mysqltest.cc:
  Fixed compiler warning
mysql-test/t/partition_innodb_semi_consistent.test:
  Added missing --reap (fixes random failure)
sql/net_serv.cc:
  When compiling with debug, don't clear buffer in 'net_clear()'
  - This allows us to easier find bugs in the protocol and also get repeatable test failures in test cases where someone forgot to do --reap
storage/myisam/ft_boolean_search.c:
  Fixed compiler warnings
storage/myisam/ft_parser.c:
  Fixed compiler warnings
storage/myisam/ft_stopwords.c:
  Fixed compiler warnings
support-files/compiler_warnings.supp:
  Added a lot of new suppression of not relevant warnings and warnings in systems we are not in charge of
unittest/mysys/waiting_threads-t.c:
  Fixed compiler warnings