Fix a bug where -DDEBUG would cause an infinite loop in mem_alloc_tiny()
because MEM_ALLOC_SIZE is set to zero (Jumbo-specific) and we ended up
never breaking out of the while loop. Thanks to bytebieger for noticing
the problem and patiently convince me.
Fix another potential problem with -DDEBUG vs. mem_alloc_tiny().
Print human readable OpenSSL version string with --list=build-info.
Update CHANGES-jumbo & CREDITS-jumbo.git