- move the P_PAX_ flags out of #ifdef PAX_ASLR in pax.h
- add a generic pax_flags_active() function
- fix a comment in exec_elf.c; interp is not static
- KNF for return
- rename pax_aslr() to pax_aslr_mmap()
- rename pax_segvguard_cb() to pax_segvguard_cleanup_cb()