Description:
------------
Some compile issues arise with compiling this extension for php8:

Some compile issues arise with compiling this extension for php8:

ssh2.c:49:2: warning: implicit declaration of function 'ZEND_ARG_PASS_INFO'; did you mean 'ZEND_ARG_OBJ_INFO'? [-Wimplicit-function-declaration]
   49 |  ZEND_ARG_PASS_INFO(1)
      |  ^~~~~~~~~~~~~~~~~~
      |  ZEND_ARG_OBJ_INFO
ssh2.c:49:2: warning: initialization of 'const char *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
ssh2.c:49:2: note: (near initialization for 'php_ssh2_first_arg_force_ref[1].name')
ssh2.c:49:2: error: initializer element is not constant
ssh2.c:49:2: note: (near initialization for 'php_ssh2_first_arg_force_ref[1].name')
ssh2.c: In function 'php_ssh2_debug_cb':
ssh2.c:103:17: warning: implicit declaration of function 'call_user_function_ex'; did you mean 'call_user_function'? [-Wimplicit-function-declaration]
  103 |  if (FAILURE == call_user_function_ex(NULL, NULL, data->disconnect_cb, NULL, 3, args, 0, NULL)) {
      |                 ^~~~~~~~~~~~~~~~~~~~~
      |                 call_user_function
ssh2.c: In function 'zif_ssh2_disconnect':
ssh2.c:443:6: error: void value not ignored as it ought to be
  443 |  if (zend_list_close(Z_RES_P(zsession)) != SUCCESS) {
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ssh2.c:443:41: error: invalid operands to binary != (have 'const zend_internal_arg_info[1]' {aka 'const struct _zend_internal_arg_info[1]'} and 'int')
  443 |  if (zend_list_close(Z_RES_P(zsession)) != SUCCESS) {
      |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^~
      |      |
      |      void