sys/tcp.h does not compile with _POSIX_SOURCE

[hyjial]

Hi list !

There is a u_int on line 50 of sys/tcp.h. u_int is defined only if
__BSD_VISIBLE is which it is not is _POSIX_SOURCE is defined.

Is this intended ?

Hit into this when trying to build a program which uses libsoup.

Thanks,

hyjial