V35.HZ11WIP4

build.sh:
- removed small and tiny builds
- changed to tomatoware toolchain
source code:
- removed READ_FILE, READ_GIF, TINY, SAVE_RESP support
- promoted STATS_PIPE, PORT_MODE, MULTIPORT, STATS_REPLY, GEN204_REPLY, REDIRECT, DO_COUNT, TEXT_REPLY, NULLSERV_REPLIES, SSL_RESP to base features and removed any #else code
- moved child reaping and stats counting from signal handler to main()
- child exit status is now reported on the stats pipe instead of via exit() codes
- child exit states are now defined in an enum
- a struct is now used for transferring multiple data fields across the stats pipe
- treat any extension starting with .js as a text file
- use SOMAXCONN as the default listen() backlog size
- various minor tweaks