soup-session: fix connection-closing behavior on abort
soup-session: fix connection-closing behavior on abort

soup_session_abort()'s docs claim that it closes "all idle persistent
connections", but it was actually trying to close *all* connections,
including ones that were being actively used in other threads. Fix
that.

https://bugzilla.redhat.com/show_bug.cgi?id=1093314

jwendell/libsoup,fanc999/libsoup,fanc999/libsoup,jwendell/libsoup,fanc999/libsoup,fanc999/libsoup,jwendell/libsoup,jwendell/libsoup,fanc999/libsoup,jwendell/libsoup