updated readme, installation script and corrected error stream reading in ipsec_exists()

Author: morpheusthewhite

README.md

@@ -3,6 +3,7 @@ A python application with gui to connect automatically to the recommended NordVP
 
 All server types on NordVPN site are available to be selected in the window.
 
+<b> NOTE </b>: ikev2 support is tested on Debian, Arch and derivatives (if something's not right button won't show up)
 ### Installation and requirements
 
 For <b>Debian/Ubuntu</b>, <b>Fedora/Red Hat</b> and <b>Arch Linux</b> users:

bin/vpn_util/ikev2.py

@@ -44,7 +44,7 @@ def ipsec_exists():
     Verifies if ipsec is existing in the os
     :return: a boolean: True if ipsec exists, false otherwise
     """
-    (_, err) = Popen(["sudo", "ipsec", "--version"], stdout=PIPE, stderr=PIPE).communicate()
+    (_, err) = Popen(["sudo", "ipsec", "--version"], stdout=PIPE, stderr=PIPE, universal_newlines=True).communicate()
     if "not found" in err:
         return False
 

install.sh

@@ -8,7 +8,8 @@ if ! [ -z `which apt-get 2> /dev/null` ]; # Debian
     libcharon-extra-plugins
 fi
 if ! [ -z `which dnf 2> /dev/null` ]; # Fedora
-    then sudo dnf install python3 python3-tkinter python3-requests openvpn wget unzip strongswan strongswan-charon-nm
+    then sudo dnf install python3 python3-tkinter python3-requests openvpn wget unzip
+    # sudo dnf install strongswan strongswan-charon-nm libreswan ldns unbound-libs
 fi
 if ! [ -z `which pacman 2> /dev/null` ]; # Arch Linux
     then sudo pacman -Sy python3 tk python-requests openvpn wget unzip strongswan