fix: remove unneeded ssl include, rename for future changes

src/unlocker/ssl.cpp

@@ -1,4 +1,4 @@
-#include "cert_manager.h"
+#include "ssl.h"
 #include <nerutils/log.h>
 #include <openssl/bio.h>
 #include <openssl/err.h>

src/unlocker/ssl.h

@@ -3,7 +3,16 @@
 #include <string>
 #include <unordered_map>
 #include <mutex>
-#include <openssl/ssl.h>
+
+struct x509_st;
+struct ssl_st;
+struct ssl_ctx_st;
+struct evp_pkey_st;
+
+typedef struct x509_st X509;
+typedef struct ssl_st SSL;
+typedef struct ssl_ctx_st SSL_CTX;
+typedef struct evp_pkey_st EVP_PKEY;
 
 class CertManager
 {