Fix #66021 (Blank line inside empty array/object)

Changed json_encode() so that when the JSON_PRETTY_PRINT option is specified,
the pair of linefeeds immediately after an opening bracket and before the
corresponding closing bracket is omitted when the array or object contains no
elements or accessible properties (and hence would have a blank line between
the brackets).
Fixed bug 64604
First non-working test of segfault handlers
Committed the damned new files
Finished working for today, continuing tomorrow (not working)
First semi-working version of a single watchpoint
- Fixed build
- Staticfy some functions
Moved btree to separate file; minor fixes and completitions
Merge branch 'watchpoints' of ssh://github.com/krakjoe/phpdbg into watchpoints

Conflicts:
	phpdbg_watch.c
Preventing possible segfault
Handle automatic removing of watchpoints and cleanup at the end
first working version of wildcard watchpoints
Added deleting of watchpoints
Fixed deletion of watchpoints
ZTS fixed
ZTS fixed
Merge branch 'watchpoints' of https://github.com/krakjoe/phpdbg into watchpoints
credits file
Merge branch 'master' into watchpoints

Conflicts:
	CREDITS
	phpdbg.c
	test.php