Updated patch for exim-4.77, exim compiles cleanly and works ok with this
patch, no problems so far.
The patch creates a new option "strip_nul_char" that can be set in exim.conf to
activate the new feature. If the feature is not active the codepath is exaclty
the same as before, there is only three "if (strip_nul_char) continue;" made in
three places in src/receive.c (2 in read_message_data, 1 in