Do not let people install on a lower version of PHP

Previously it would simply warn them about a lower version of PHP, we should prevent it entirely since below 5.3.8 SMF will more than likely break.

Signed-off-by: Shitiz Garg <mail@dragooon.net>
Fixes for upgrade.php on legacy PHP version

Do not let it throw a parse error, instead show a graceful error message

Signed-off-by: Shitiz Garg <mail@dragooon.net>
Rename action=unwatchtopic to action=notifytopic

Signed-off-by: Shitiz Garg <mail@dragooon.net>
Remove notify links from various sections other than Display

Fixes #2528

Signed-off-by: Shitiz Garg <mail@dragooon.net>
Remove can_mark_notify as well

Signed-off-by: Shitiz Garg <mail@dragooon.net>
Fix board notify preferences

Also fixed undefined index id_topic

Signed-off-by: Shitiz Garg <mail@dragooon.net>
Merge pull request #2539 from Dragooon/notifytopic

Notify links improvements
! Don't try to send email to empty addresses (fixes #2541)

Signed-off-by: Michael Eshom <oldiesmann@oldiesmann.us>
Remove "empty()" check since trim already handles null

Signed-off-by: Michael Eshom <oldiesmann@oldiesmann.us>
Merge pull request #2542 from Oldiesmann/release-2.1

! Don't try to send email to empty addresses (fixes #2541)
Wrong link in alerts popup

Signed-off-by: Diego Andrés diegoandres_cortes@outlook.com
Alerts should be shown as active

Signed-off-by: Diego Andres diegoandres_cortes@outlook.com
Merge pull request #2544 from DiegoCortes/patch-4

Alerts should be shown as active
Merge pull request #2543 from DiegoCortes/patch-3

Wrong link in alerts popup
Merge pull request #2535 from Dragooon/legacyphp

Installer and upgrader improvements on older versions of PHP