hp malloc: rename functions, update headers, add some comments
(cherry picked from commit d504e9fe6d531b2102133ac56337f17f60accbe8)
hp malloc: increase built-in PKG mem size to match the larger hash

	* otherwise, "opensips -V" would fail
(cherry picked from commit 6246df172cede302e33bb63e667a4786e2a47c17)
hp malloc: expose memory warming parameters in the script
(cherry picked from commit 83c97e8a6f9a3c14dd393722467d701c7d03f87b)