rename Security class to Security_base to fix namespace conflict
show avatar or mask hostname correctly
rendering blockquotes more correctly
[#59296] fixup pagename bug with + chars

do not urldecode()/urlencode "+" chars to use "+" char in the pagename

reported by petpro
do not translate "+" to space to support '+' chars in pagenames
MoinMoin compat fix

link single special char links like as [[+]] [[$]] etc.
bump up version to 1.2.1-GIT