SILC User modes. These indicate the status and presence of the client
    in the SILC network.

    #define SILC_UMODE_NONE              0x00000000 /* Normal SILC user */
    #define SILC_UMODE_SERVER_OPERATOR   0x00000001 /* Server operator */
    #define SILC_UMODE_ROUTER_OPERATOR   0x00000002 /* Router (SILC) operator */
    #define SILC_UMODE_GONE              0x00000004 /* Client is gone */
    #define SILC_UMODE_INDISPOSED        0x00000008 /* Client is indisposed */
    #define SILC_UMODE_BUSY              0x00000010 /* Client is busy */
    #define SILC_UMODE_PAGE              0x00000020 /* Client requests paging */
    #define SILC_UMODE_HYPER             0x00000040 /* Client is hyper active */
    #define SILC_UMODE_ROBOT             0x00000080 /* Client is a robot */
    #define SILC_UMODE_ANONYMOUS         0x00000100 /* Client is anonymous */
    #define SILC_UMODE_BLOCK_PRIVMSG     0x00000200 /* Client blocks privmsgs */
    #define SILC_UMODE_DETACHED          0x00000400 /* Client is detached */
    #define SILC_UMODE_REJECT_WATCHING   0x00000800 /* Client rejects watching */
    #define SILC_UMODE_BLOCK_INVITE      0x00001000 /* Client blocks invites */