merge with 5.5-tokudb tree. In particular:

* add TokuDB, together with the ft-index library
* cmake support, auto-detecting whether tokudb can be built
* fix packaging - tokudb-engine.rpm, deb
* remove PBXT
* add jemalloc
* the server is built with jemalloc by default even if TokuDB is not built
* documentation files in RPM are installed in the correct location
* support for optional deb packages (tokudb has specific build requirements)
* move plugins from mariadb-server deb to appropriate debs (server/test/libmariadbclient)
* correct mariadb-test.deb to be not architecture-independent
* fix out-of-tree builds to never modify in-tree files
* new handler::prepare_index_scan() method

CMakeLists.txt

@@ -136,6 +136,7 @@ INCLUDE(mysql_version)
 INCLUDE(cpack_source_ignore_files)
 INCLUDE(install_layout)
 INCLUDE(cpack_rpm)
+INCLUDE(cpack_deb)
 
 # Add macros
 INCLUDE(character_sets)
@@ -144,6 +145,7 @@ INCLUDE(ssl)
 INCLUDE(readline)
 INCLUDE(libutils)
 INCLUDE(dtrace)
+INCLUDE(jemalloc)
 INCLUDE(ctest)
 INCLUDE(plugin)
 INCLUDE(install_macros)
@@ -263,6 +265,8 @@ MYSQL_CHECK_SSL()
 # Add readline or libedit.
 MYSQL_CHECK_READLINE()
 
+CHECK_JEMALLOC()
+
 #
 # Setup maintainer mode options by the end. Platform checks are
 # not run with the warning options as to not perturb fragile checks
@@ -362,15 +366,12 @@ ADD_CUSTOM_TARGET(INFO_BIN ALL
   WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
 )
 
-INSTALL(FILES COPYING COPYING.LESSER LICENSE.mysql 
-DESTINATION ${INSTALL_DOCREADMEDIR} 
-COMPONENT Readme
-OPTIONAL
-)
-INSTALL(FILES README DESTINATION ${INSTALL_DOCREADMEDIR} COMPONENT Readme)
-INSTALL(FILES ${CMAKE_BINARY_DIR}/Docs/INFO_SRC ${CMAKE_BINARY_DIR}/Docs/INFO_BIN DESTINATION ${INSTALL_DOCDIR})
+INSTALL_DOCUMENTATION(README COPYING COPYING.LESSER
+                      COMPONENT Readme)
+INSTALL_DOCUMENTATION(${CMAKE_BINARY_DIR}/Docs/INFO_SRC
+                      ${CMAKE_BINARY_DIR}/Docs/INFO_BIN)
 IF(UNIX)
-  INSTALL(FILES Docs/INSTALL-BINARY DESTINATION ${INSTALL_DOCREADMEDIR} COMPONENT Readme)
+  INSTALL_DOCUMENTATION(Docs/INSTALL-BINARY COMPONENT Readme)
 ENDIF()
 
 INCLUDE(CPack)