doc: fix OPENSSL_VERSION_NUMBER length in the synopsis
The number has 8 digits (not 9). It is a single integer `0xMNN00PP0L`.
@@ -41,7 +41,7 @@ OpenSSL_version_num, OPENSSL_info
Deprecated:
/* from openssl/opensslv.h */
- #define OPENSSL_VERSION_NUMBER 0xnnnnnnnnnL
+ #define OPENSSL_VERSION_NUMBER 0xnnnnnnnnL
/* from openssl/crypto.h */
unsigned long OpenSSL_version_num();
