pfSense

Fix #6864 automatically convert IPv6 input to lowercase

1) As the user leaves the field, or presses Save, onChange will fire and
convert the input string to lowercase. This saves the user havng to even
think about it.
2) Provide some extra text that describes the expected format, to avoid...

Fix #6758

extensions.ini must be readable by any users otherwise any php script
called by a non-root user will not be able to use PHP extensions

This is a direct fix for RELENG_2_3_2 since extensions.ini is not being
used anymore on RELENG_2_3 or master

Fix display advanced after input error for system_gateways_edit

Use case:
1) Edit a gateway that has no advanced settings (i.e. the Advanced section does not need to open on page load) - that works fine.
2) Modify the Gateway IP Address to something invalid like 1:2::z...

Better handle no dhcpv6 leases file

(cherry picked from commit 2355c154b7598f937ba2121429659f5676ce4d96)

Fix #6872 CP bandwidth 0 is no valid

The front-end validation prevents zero from being entered. "Leave empty" is the way to specify no limit.
(cherry picked from commit b7f2ebb5448f7992cceec899504bdd0a29058fb9)

Fix typo: The input field is named source_hash_key

(cherry picked from commit 870b9bc11b993ce8122b448083d29a04bcb30151)

Spelling mistake "system_gateways.php"

Fix spelling mistake in "system_gateways.php"

(cherry picked from commit 47180823dc0560801085a227abf512e265363b16)

Revise merge error

Applied PR #3173 to correct merge error

Fixed #6835 by revising Javascript show/hide

(cherry picked from commit 850c3d8b9352e7467beca8502c24ca8d4fbbbd29)