Use "const char *" instead of "char *" for filenames passed to functions.

Submitted by:
Reviewed by:
PR:
diff --git a/ssl/ssl_rsa.c b/ssl/ssl_rsa.c
index 0f87752..ba0c7f5 100644
--- a/ssl/ssl_rsa.c
+++ b/ssl/ssl_rsa.c
@@ -82,7 +82,7 @@
 	}
 
 #ifndef NO_STDIO
-int SSL_use_certificate_file(SSL *ssl, char *file, int type)
+int SSL_use_certificate_file(SSL *ssl, const char *file, int type)
 	{
 	int j;
 	BIO *in;
@@ -253,7 +253,7 @@
 
 #ifndef NO_RSA
 #ifndef NO_STDIO
-int SSL_use_RSAPrivateKey_file(SSL *ssl, char *file, int type)
+int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type)
 	{
 	int j,ret=0;
 	BIO *in;
@@ -338,7 +338,7 @@
 	}
 
 #ifndef NO_STDIO
-int SSL_use_PrivateKey_file(SSL *ssl, char *file, int type)
+int SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type)
 	{
 	int j,ret=0;
 	BIO *in;
@@ -494,7 +494,7 @@
 	}
 
 #ifndef NO_STDIO
-int SSL_CTX_use_certificate_file(SSL_CTX *ctx, char *file, int type)
+int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type)
 	{
 	int j;
 	BIO *in;
@@ -591,7 +591,7 @@
 	}
 
 #ifndef NO_STDIO
-int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, char *file, int type)
+int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type)
 	{
 	int j,ret=0;
 	BIO *in;
@@ -673,7 +673,7 @@
 	}
 
 #ifndef NO_STDIO
-int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, char *file, int type)
+int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type)
 	{
 	int j,ret=0;
 	BIO *in;