net/cryptcat: Fix numerous LLVM15 build errors

Fix numerous instances of,

netcat.c:241:22: error: incompatible integer to pointer conversion passing 'unsigned int' to parameter of type 'char *' [-Wint-conversion]

bail (wrote_txt, wrote_net, wrote_out);
                 ^~~~~~~~~

While at it assume care and feeding of this port.

MFH: 2023Q2