s/noOIDIncreasingCheck/oid_increasing_check/

new propery noOIDIncreasingCheck allowing to skip
OID increasing check (userful for bogus SNMP agents)

swap non_repeaters and max_repetitions in walk query, max_repetitions whould be used more frequently

fix FR #54502: allow user to change OID value output mode when SNMP_VALUE_OBJECT is used.

backport r313324

remove PHP_VERSION_ID ifdef's, limiting to 5.4 branch

merging from trunk (r312088...r312092):
move SNMP VERSION constants into SNMP class itself
fix typo in comment
no more method open
fix method names in header

- Added new parameter parsing option (p - for valid path (string without null byte in the middle))
# The tests will be fixed in the next commits

fixed typos in tests
ucd-snmp epoch is over, drop legacy memory allocation (non e*)
tune 'buggy snmp_snprint_value' detection on some systems

method renaming:
SNMP::get_errno() -> SNMP::getErrno()
SNMP::get_error() -> SNMP::getError()

remove method open, __construct is enough

* new option for SNMP::get: force keys of return array be as in request array
* new option for SNMP::walk: use suffix of OID for keys in return array, not full OID

fix error reporting on OID not increasing
calling arguments markup

* Net-SNMP version detection and proper processing
* more UCD-SNMP-related code removal

* added detection and walkaround for net-snmp library bug (net-snmp BUGid 2027834)
* drop UCD-SNMP support, R.I.P.

Fix common typos in the source code (Reported in Bug #54065)
# External libraries were excluded
# Thanks eitan at eitanadler dot com for the first patch :)

follow CS:
- method set_security should be named as setSecurity
- SNMP_VERSION_2C constant

revert r309111 (name_len was not a typo)

fix typo in SNMP_SNPRINT_VALUE usage: use val_len, not name_length

* tune snmp2_walk.phpt
* more net-snmp v5.3 compatibility (OPAQUE_SPECIAL_TYPES)

* fix warning about redefining REGISTER_PDO_CLASS_CONST_LONG (damn copy'n'paste)
* tuned two unit test that failed at gcov.php.net/PHP_HEAD

fix warnings mentioned in 'Parameter Parsing Report'

remove compiler warnings
fix various memory leaks seen with --enable-debug

* new methods get_errno, get_error to get errno and error string
of last SNMP-related error
* formatting markup
* some fixes in max_oids logic: NULL will set it to default value,

* new methods get_errno, get_error to get errno and error string
of last SNMP-related error
* formatting markup
* some fixes in max_oids logic: NULL will set it to default value,
do not allow non-positive user-supplied values
* unit tests for changes

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fix parse errors for non_repeaters & max_repetitions: aligment errors