pppd: Fix compilation with openssl disabled (#431)

If openssl is disabled at configure time but microsoft extensions are enabled,
we get a compilation error due to an unnecessary include in crypto_ms.c.
This removes the unnecessary include.  With this, pppd compiles without
openssl as long as you add the following arguments to the configure script
invocation:

        --disable-peap --disable-eaptls --without-openssl

Fixes: #429

Signed-off-by: Eivind Næss <[email protected]>

pppd/crypto_ms.c

@@ -122,8 +122,6 @@ MakeKey(const unsigned char *key, unsigned char *des_key)
 	DES_set_odd_parity((DES_cblock *)des_key);
 }
 
-#include <openssl/evp.h>
-
 int
 DesEncrypt(const unsigned char *clear, const unsigned char *key, unsigned char *cipher)
 {