apply the latest patches.
add posix key pair and do preallocation in key manager init.
POSIX Key update to pass compilation.
enable POSIX Key unlimited mode by adding freelist structure.
add the unlimited test cases again.
remove bug in confdefs.h
remove bug in key.c
revert psxkey08.
change freelist bump size to maximum_key_pairs.
add comment in freelist module and rename one member name in freelist structure.
update name.
enable freelist do memory allocate both in heap and workspace.