Add some text about OpenSSL on OS X: The version in the base system is very
old, so people should probably point the spiped build at a newer release.

Submitted by:	Frederick Akalin


git-svn-id: http://spiped.googlecode.com/svn/trunk@172 592f418a-0512-ad62-f63d-38f288cbaac7
Turn off unused function warning

This is triggered by the use of ELASTICARRAYDECL() in
libcperciva/datastruct/ptrheap.c; ptrlist_resize() is never used.
Turn off warnings in system headers

Ths typedef redefinition warning is triggered by the definition of
the va_list typedef in /usr/include/sys/_types/_va_list.h.
Add CFLAGS_POSIX to CFLAGS in spipe{,d}/Makefile

This lets 'bsdmake -f Makefile.POSIX' work.
Turn off deprecated declaration warning

This is triggered by the use of AES_set_encrypt_key() (deprecated in OS
X 10.7) in libcperciva/crypto/crypto_aes.c.
Remove -lrt switch

Apparently it is merged into libc on OS X.