A ext/sqlrr/sqlrr.[ch] -- add sql recording/replay support (very experimental extension -- pre alpha)

M ext/rtree/rtree.c -- fix cast compiler warning

M src/func.c -- substring backward compatiblity <rdar://problem/6778339>

M src/legacy.c -- replay recorder calls

M src/main.c -- if SQLITE_ENABLE_AUTO_PROFILE, call sqlite3_profile when env(SQLITE_AUTO_PROFILE) -- replay recorder calls

M src/mem1.c -- use custom malloc zone on single core systems

M src/os_unix.c -- hostid via gethostuuid -- read-only file system support for proxy locking -- improved handling of simulated shared lock on AFP/SMB on 64 bit systems -- disable whole-file-lock NFS file locking -- fix for downgrading from exclusive to shared lock on NFS -- proxy lock breaking & recreating local lock files -- support SQLITE_OPEN_AUTOPROXY flag -- only write 1st byte into new zero-length files if fs is DOS -- cache fs type info in unixFile struct -- force use of fsync() even if fdatasync() is available -- remove flock locking style support for SMB -- replace strcpy with strlcpy

M src/prepare.c -- replay recorder calls

M src/sqlite.h.in -- added SQLITE_OPEN_AUTOPROXY

M src/sqliteInt.h -- include replay recorder header

M src/vdbeapi.c -- checking for NULL statement for <rdar://6646331> -- replay recorder calls