Sync sqlite -> PECL terminology with release announcement's

Reorganized to remove duplication. Cross checked a few php.ini settings.

Area owners need to do a thorough review of this file.

Some basic tidy up and whitespace fixes.

The file still needs section disambiguation to remove duplicate
entries.

- Cleanup UPGRADING and UPGRADING.INTERNALS from 5.4 changes.
- Added information about removal of streams pooling API.

Add a __wakeup() method to SplFixedArray, thereby fixing serialising an
SplFixedArray object and bug #60560 (SplFixedArray un-/serialize, getSize(),
count() return 0, keys are strings).

add notes about ob_start(), gzencode() and removed hash algos

implement the solution for isset/string offsets, fix bug #60362

Added max_input_vars directive to prevent attacks based on hash collisions

Added max_input_vars directive to prevent attacks based on hash collisions

- Updated UPGRADING, protos and attribution in ext/intl/idn/idn.c

Sorted engine changes by severity and added chained
string offset description.

Revert last commit
Keep get_magic_quotes_gpc and get_magic_quotes_runtime as deprecated
even if it's not the case in the code

Those functions are not deprecated (r319249 #55371)

add callable as reserved word

Note the change in ob_start() chunk size behaviour mentioned in doc bug #60243
(Add way to specify output buffering chunk size of 1).

add is_a change

fix typo

- Added class member access on instantiation (e.g. (new foo)->bar()) support

- Reverted changes that required constructor overrides to invoke the parent
constructor in several SPL classes and applied 5.3 fixes instead.
Related bugs: #54384, #55175 and #55300

- Reverted changes that required constructor overrides to invoke the parent
constructor in several SPL classes and applied 5.3 fixes instead.
Related bugs: #54384, #55175 and #55300

typo

Spaces not TABS here

update UPGRADING

Update UPGRADING
# more to come soon

- Document changes in upgrading.