[PATCH] More type related cleanups

More type related cleanups:

• Add casts where implicit casting would happen otherwise (covers all, except those int->char casts that are harmless.)

• Resolve accuracy issues, mostly by changing long to int (except in one case in source.c where it's the other way round)

• More int -> size_t changes when buffer sizes are involved. While doing so, slightly rewrite get_line() in auth_htpasswd.c to not shadow the len parameter.

• While in httpp.h, remove prototype for nonexistent function httpp_parse_icy()

• Adjust sanity checks to not test whether an unsigned variable is < 0

• In net/sock.c, use sizeof(ip) instead of MAX_ADDR_LEN

• Do not forget to #include <sys/types.h> and "compat.h" whenever _t types are used