channels: Use a structure to store exit information

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>

include/libssh/channels.h

@@ -80,7 +80,12 @@ struct ssh_channel_struct {
     ssh_buffer stdout_buffer;
     ssh_buffer stderr_buffer;
     void *userarg;
-    uint32_t exit_status;
+    struct {
+        bool status;
+        uint32_t code;
+        char *signal;
+        bool core_dumped;
+    } exit;
     enum ssh_channel_request_state_e request_state;
     struct ssh_list *callbacks; /* list of ssh_channel_callbacks */