Fix #910, 914
(cherry picked from commit 16280ffe6c16788af8973eb31cef7948d955b74b)

Conflicts:
	ext/kernel/memory.c
The root memory frame survives across requests
(cherry picked from commit e18a27cad67556b54fc1137a4658528a03830f5c)

Conflicts:
	ext/phalcon.c
Do not restore stack too many times
(cherry picked from commit 6e77ea7ce647b8e8f6f2b4c7855b50817636bf9d)
Fix bug in phalcon_escape_multi() introduced in 1ce094c60dd4a4ef674cbbfe7ae86e22958655e7
(cherry picked from commit e12bfdda72c77212953dd18b54ceff5b8a04a737)
Fix #908
(cherry picked from commit a3a425666db96dd77db7cd128ee0025df81c78cf)
Commented out listenLowSeverity()
(cherry picked from commit 3622be471e9e1e865593fe5945785482780e9cd0)
Fix invalid memory reads when GC is on
(cherry picked from commit 46f3955ed886b9987c3605fc88f8ea1795c71b06)
Fix #701
(cherry picked from commit 5ad9ddc62585986caaf1d4f269cfa1658a735b5d)