net: add openssl header dir on arm64 macs

vlib/net/openssl/c.v

@@ -1,13 +1,12 @@
 module openssl
 
-// On linux, prefer a localy build openssl, because it is
+// On Linux, prefer a localy built openssl, because it is
 // much more likely for it to be newer, than the system
 // openssl from libssl-dev. If there is no local openssl,
 // the next flag is harmless, since it will still use the
 // (older) system openssl.
 #flag linux -I/usr/local/include/openssl -L/usr/local/lib
 #flag windows -l libssl -l libcrypto
-
 #flag -l ssl -l crypto
 // MacPorts
 #flag darwin -I/opt/local/include
@@ -15,44 +14,83 @@ module openssl
 // Brew
 #flag darwin -I/usr/local/opt/openssl/include
 #flag darwin -L/usr/local/opt/openssl/lib
+// Brew arm64
+#flag -I /opt/homebrew/Cellar/openssl@1.1/1.1.1h/include
+#flag -L /opt/homebrew/Cellar/openssl@1.1/1.1.1h/lib
+//
 #include <openssl/rand.h> # Please install OpenSSL development headers
 #include <openssl/ssl.h>
 #include <openssl/err.h>
+pub struct C.SSL {
+}
 
-pub struct C.SSL {}
+pub struct SSL_CTX {
-pub struct SSL_CTX {}
+}
-pub struct SSL {}
+
-pub struct SSL_METHOD {}
+pub struct SSL {
+}
+
+pub struct SSL_METHOD {
+}
 
 fn C.BIO_new_ssl_connect() voidptr
+
 fn C.BIO_set_conn_hostname() int
+
 fn C.BIO_get_ssl()
+
 fn C.BIO_do_connect() int
+
 fn C.BIO_do_handshake() int
+
 fn C.BIO_puts()
+
 fn C.BIO_read() int
+
 fn C.BIO_free_all()
+
 fn C.SSL_CTX_new() &C.SSL_CTX
+
 fn C.SSL_CTX_set_options()
+
 fn C.SSL_CTX_set_verify_depth()
+
 fn C.SSL_CTX_load_verify_locations() int
+
 fn C.SSL_CTX_free()
+
 fn C.SSL_new() &C.SSL
+
 fn C.SSL_set_fd() int
+
 fn C.SSL_connect() int
+
 fn C.SSL_set_cipher_list() int
+
 fn C.SSL_get_peer_certificate() int
+
 fn C.ERR_clear_error()
+
 fn C.SSL_get_error() int
+
 fn C.SSL_get_verify_result() int
+
 fn C.SSL_set_tlsext_host_name() int
+
 fn C.SSL_shutdown() int
+
 fn C.SSL_free()
+
 fn C.SSL_write() int
+
 fn C.SSL_read() int
+
 fn C.SSL_load_error_strings()
+
 fn C.SSL_library_init()
+
 fn C.SSLv23_client_method() &C.SSL_METHOD
+
 fn C.TLSv1_2_method() voidptr
 
 fn init() {