Fix for SHOW VARIABLES in embedded server


Docs/internals.texi:
  Added documentation for join_buffer_size
configure.in:
  Changed version number
sql/log_event.cc:
  Fix for bug in LOAD DATA INFILE
sql/log_event.h:
  Fix for bug in LOAD DATA INFILE
sql/slave.cc:
  Fix for bug in LOAD DATA INFILE
sql/sql_show.cc:
  Fix for SHOW VARIABLES in embedded server