Make num_links=0 in pagination library possible to configure
Revert "Make num_links=0 in pagination library possible to configure"

This reverts commit a01924d2cc2d63d2bddbee85a18b423b88a9b19e.
Make 'num_links=0' configuration available in Pagination library

Changed conditions when making 'first' and 'last' links
Add a changelog entry in Pagination Library section
Fixed a changelog entry
Fixed the changelog entry again
Merge pull request #3104 from TakayukiSakai/develop

Make num_links=0 in pagination library possible to configure
Fix #3112
Remove the custom IV option from CI_Encryption

It serves for no practical purpose and can only do harm.
[ci skip] Leftover from 1e83d69a52a85a4f568bfa086d658556acd48980
Fix a _potential_ flaw in password_hash()
Add CI_Encryption::create_key()

This was planned, we somehow forgot about it. :)
Fixed typo
Fixed eof
Merge pull request #3121 from GrahamCampbell/patch-1

Fixed Typo In Security.php
Fix #3124
Merge branch 'develop' of github.com:EllisLab/CodeIgniter into develop
Remove GCM mode from CI_Encryption (OpenSSL)

While openssl_get_cipher_methods() lists 'aes-<keysize>-gcm' as supported,
it appears that this is only half of the story. To be more specific, only
the encryption operation of GCM is performed, and the authentication message
is completely missing, rendering the whole thing useles.
Missing looping index added. Without index empty rows returned for csv column headers.
Merge pull request #3130 from dionysiosarvanitis/fix/pdo_result__list_fields

Missing looping index added.