First draft of an xml protocol
A few general segfault fixes
Fix breakpoints and listing
Merge branch 'master' into xml-protocol

Conflicts:
	phpdbg_prompt.c
Use consistently "num" for an nth opline number
Fix accidental short-circuiting when comparing fds (& warnings)
Use more consistent naming in info command for xml protocol
Better naming in list command and inform about filename
Merge branch 'master' into xml-protocol

Conflicts:
	phpdbg_utils.c
Fix tests
Make print command xml output more consistent
Make phpdbg_prompt.c xml messages more consistent
Make set commands more consistent
Push first draft of xml protocol documentation
Fix typo: inactivee => inactive
Remove accidental insertion of a single "s"
Fix precision handling in strings
Consistency in breakpoint tags, <run> => <stop>
Fix infinite recursion issues (segfaults)
Add request_id possibility for xml output