Set umask to 0022 instead of 0027.
Lines are more readable at compile time.
As a new version comes, with type of data changes, new bugs appeared. Andres corrected a bug that made ipfm segfault when no data to output. Robert made ipfm keep using promisc mode under Linux, due to libpcap misbehaviour with program forks. Not all compilers work with this type, but we don't know which ones. This was to make ipfm support transfers bigger than 4GBytes.