Defines starting with `d' in src/slirp

• DBG_CALL src/slirp/slirpdebug.h:16
• DBG_ERROR src/slirp/slirpdebug.h:18
• DBG_MISC src/slirp/slirpdebug.h:17
• DEBUG src/slirp/slirp.h:6
• DEBUG_DEFAULT src/slirp/slirpdebug.h:19
• DECLARE_IOVEC src/slirp/slirp_config.h:66
• DEFAULT_BAUD src/slirp/slirp.h:296
• DHCPACK src/slirp/bootp.h:79
• DHCPDISCOVER src/slirp/bootp.h:76
• DHCPOFFER src/slirp/bootp.h:77
• DHCP_OPT_LEN src/slirp/bootp.h:97
• DHCPREQUEST src/slirp/bootp.h:78
• DO_KEEPALIVE src/slirp/slirp_config.h:13