signed/unsigned compiler warning fixes

Fixed typo.

4 new functions :
array_udiff()
array_udiff_assoc()
array_diff_uassoc()
array_udiff_uassoc()
They work like array_diff() or array_diff_assoc() but callback function(s)
can be

4 new functions :
array_udiff()
array_udiff_assoc()
array_diff_uassoc()
array_udiff_uassoc()
They work like array_diff() or array_diff_assoc() but callback function(s)
can be used to perform the comparisons. For example array_udiff_uassoc()
expects 2 callbacks are last 2 parameters one is used to compare the values
of the entries in the arrays the second to compare the keys.
Class methods are also valid callbacks. Even when the data that should be
used in the comparison is private or protected then a static method of a
class should be used (this behaviour can be seen in the regression test -
007.phpt).

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improve the fix for #25494. If more then one bad parameter is passed
an warning for all will be emitted.

Fixed bug #25494 (array_merge allowing "false" as argument (silent when
non-array is passed))
# 4.3 throws E_NOTICEs, 5 errors out on non-array args as per Ilia's
# suggestion.

revert that, it did not fix anything

Fix external builds (configure run outside srcdir)

emalloc -> safe_emalloc

Fixed bug #24897 (inconsistent behavior of shuffle() & array_multisort())

Do not assume array contains numeric values.

Fixed bug #24980 (array_reduce() uses first element as default running
total).
Fixed memory leak that can be replicated using the function example on
http://www.php.net/array_reduce

Replace fast_call_user_function() with zend_call_function()

Fix bug #24652 - Sterling, do you begin to think that maybe it wasn't such
a good idea?

Removed unused variable.

- Use the new infrastructure of zend_symtable_*() (fixes bug #24565)
- Fix bogus use of get_current_key()

Fixed bug #24198 (Invalid recursion detection in array_merge_recurcive())

silly bug

updating license information in the headers.

fix array_key_exists() from HANDLE_NUMERIC() changes

# need to go through this file and find any stuff that relies on this
# change

initialize these to NULL

convert array functions to use fast_call_user_function(), gives a nice
performance win.

Fixed bug #22463 and bug #23581

Bug Fix (22433). When the bottom of a range() is chr(0) or the top is chr(255), the for loop carries over and never exits.

Fixed implicit cast issue with is*() and to*() functions

Kludgy fix for floating point drift causing problems like range(1.0,1.5,0.1) == array(1.0,1.1,1.2,1.3,1.4);