ifinfo: Print names of CSUM bits

[timo.voelker_fh-muenster.de]

Summary

ifinfo prints the value of if_hwassist. The value is hard to read since it is a bitmap for CSUM_* bits defined in src/sys/sys/mbuf.h. With this patch, ifinfo additionally prints the names of the CSUM_* bits.

[tuexen]

tools/tools/ifinfo/ifinfo.c

199

first is used as a boolean. Can't you use bool first instead of int first?

[timo.voelker_fh-muenster.de]

tools/tools/ifinfo/ifinfo.c

199

bool seems not to be available as a data type when building a tool.

[timo.voelker_fh-muenster.de]

Use CSUM_BITS string defined in sys/mbuf.h for output.

Use bool type, which is possible after adding #include <ctype.h>