initial
more notice css tweaks
_DISABLE_FLOICON -> _ENABLE_FLOICON
fix missing DB object when instantiated to import opml
only pass port to mysqli_connect when it is set
pref_prefs: remove second argument from the constructor
do not try to calculate icon avg color if GD is not present
Revert "_DISABLE_FLOICON -> _ENABLE_FLOICON"

This reverts commit 7f1113a56ad8e66ce3dd9886b4b11dfc30573c7f.
make logging configurable; add logging to syslog
check if http_response_header is defined
update installer mysqli_connect to only use port if defined
trim received feed data on fetch
subscribe: verify XML before adding to the database; fetch: try to work around entity problems if initial parsing fails
update_rss_feed: simplify debug reporting
remove debug_enabled global
better handle get_link() enabled plugins crashing on load
implement plugin API version compatibility check
plugins: bump API version
fetch: support if-modified-since without CURL
correctly report fetch error