Check the absolute minimum requirements in SimplePie::init(), returning false if they fail.
Check the absolute minimum requirements in SimplePie::init(), returning false if they fail.

Avoid possible notices in SimplePie_Sanitize::parse_date(), and bring the RFC822 PCRE into line with the ISO8601 PCRE.

gsnedders/complexpie,wikidi/simplepie,barryvdh/simplepie,FreshRSS/simplepie,Alkarex/simplepie,Alkarex/simplepie,mblaney/simplepie,Alkarex/simplepie,songfj/simplepie,blat/simplepie,barryvdh/simplepie,Alexia/SimplePie,wikidi/simplepie,songfj/simplepie,skyzyx/simplepie,ropik/simplepie,barryvdh/simplepie,simplepie/simplepie,simplepie/simplepie,skyzyx/simplepie,FreshRSS/simplepie,blat/simplepie,songfj/simplepie,mblaney/simplepie,wikidi/simplepie,ropik/simplepie,Alexia/SimplePie,blat/simplepie