Fix bug #111 (compile error without ZEND_SIGNALS)
Use full duplex stdin/stdout socket
Add notification at script end
Add info globals command
Always add a newline before a warning or a notice
Fix test after adding script ended notice
Send a \x03 during execution to interrupt (POSIX only)
Made some functions async safe and provide interactive shell in signal handler
Fixes also (as a side-effect) a possible bug in list function when included files become unreachable after loading by caching the file contents
This is already pretty stable; a (restricted) ev and sh may follow.
Added support for a restricted ev (variables only) in async safe contexts
Add transfer of output back to webserver and merge master in

Conflicts:
	config.m4
	phpdbg.c
	phpdbg.h
	phpdbg_cmd.c
	phpdbg_prompt.c