* configure.ac (AC_FUNC_MMAP): Added.

* configure.ac (AC_FUNC_MMAP): Added.
(AC_CHECK_FUNCS): Removed mprotect.

* src/mm/memory.c (DEFAULT_CODEMEM_SIZE): Renamed to
DEFAULT_CODE_MEMORY_SIZE.
(codememlock): Renamed to lock_code_memory.
(codememptr): Renamed to code_memory.
(codememsize): Renamed to code_memory_size.
(pagesize): Added global static variable.
(memory_init): Use new variable names and set pagesize.
(memory_cnew): Don't use malloc/mprotect as this makes some problems
with selinux enabled distributions. Instead use mmap.