fixes issue 491 + use sym regex searches to reduce replacement routine startup time
fixes issue 491
+ use sym regex searches to reduce replacement routine startup time

SVN-Revision: 390

sigma-random/drmemory,sigma-random/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory,code4bones/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory,code4bones/drmemory,code4bones/drmemory,code4bones/drmemory,sigma-random/drmemory,sigma-random/drmemory,code4bones/drmemory,LohithBlaze/drmemory