gettext params: restore ftp.gnu.org for accessing page.
gettext params: make sure to exclude latest|sig|xz|bz2
get gcc page ordered by name, not date.
Add --disable-libsanitizer

Because of https://gcc.gnu.org/ml/gcc/2013-11/msg00438.html
But that might have consequences on guile build, and
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57584
libssh2 params: restore www.libssh2.org for page and url.
curl params: has to use fossies.org instead of curl.haxx.se for page and url.
nginx params: make sure to include 1.7, not 1.5.
python params: restore www.python.org for page and url.
apr and aprutil params: uses archive.apache.org for page and url.
lynx params: uses isc.org for page and url.
flex params: uses fossies.org instead of sourceforge.net for page and url.
apache params: uses apache.org instead of mirror for page and url.