libclient/bpm_client_err.*: add error codes

libclient/bpm_client_err.c

@@ -14,6 +14,9 @@ static const char *bpm_client_err [BPM_CLIENT_ERR_END] =
 {
     [BPM_CLIENT_SUCCESS]              = "Success",
     [BPM_CLIENT_ERR_ALLOC]            = "Could not allocate memory",
+    [BPM_CLIENT_ERR_SERVER]           = "Server could not complete request",
+    [BPM_CLIENT_ERR_AGAIN]            = "Operation did not fully complete, try again",
+    [BPM_CLIENT_ERR_TIMEOUT]          = "Timeout occurred",
 };
 
 /* Convert enumeration type to string */

libclient/bpm_client_err.h

@@ -15,6 +15,9 @@ enum _bpm_client_err_e
 {
     BPM_CLIENT_SUCCESS = 0,               /* No error */
     BPM_CLIENT_ERR_ALLOC,                 /* Could not allocate memory */
+    BPM_CLIENT_ERR_SERVER,                /* Server could not complete request */
+    BPM_CLIENT_ERR_TIMEOUT,               /* Timeout occurred */
+    BPM_CLIENT_ERR_AGAIN,                 /* Operation did not fully complete, try again */
     BPM_CLIENT_ERR_END                    /* End of enum marker */
 };