Fix rfc6266 check

qutebrowser/qutebrowser.py

@@ -93,6 +93,7 @@ def main():
     earlyinit.check_qt_version()
     earlyinit.check_pyqt_webkit()
     earlyinit.check_pkg_resources()
+    earlyinit.check_rfc6266()
     # We do this import late as we need to fix harfbuzz first.
     from qutebrowser.app import Application
     app = Application(args)

qutebrowser/utils/earlyinit.py

@@ -234,13 +234,13 @@ def check_rfc6266():
 
             On Debian/Ubuntu:
                 No package available, try:
-                pip install rfc6266
+                pip3 install rfc6266
 
             On Archlinux:
                 pacman -S python-rfc6266
 
             On Windows:
-                pip install rfc6266
+                pip install rfc6266    (using python3)
 
             For other distributions:
                 Check your package manager for similiarly named packages.