docs: use GitHub issues as the bug reporting address

configure

@@ -2,7 +2,7 @@
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.71 for firejail 0.9.73.
 #
-# Report bugs to <netblue30@protonmail.com>.
+# Report bugs to <https://github.com/netblue30/firejail/issues>.
 #
 #
 # Copyright (C) 1992-1996, 1998-2017, 2020-2021 Free Software Foundation,
@@ -267,10 +267,10 @@ then :
     printf "%s\n" "$0: be upgraded to zsh 4.3.4 or later."
   else
     printf "%s\n" "$0: Please tell [email protected] and
-$0: netblue30@protonmail.com about your system, including
-$0: any error possibly output before this message. Then
-$0: install a modern shell, or manually run the script
-$0: under such a shell if you do have one."
+$0: https://github.com/netblue30/firejail/issues about your
+$0: system, including any error possibly output before this
+$0: message. Then install a modern shell, or manually run
+$0: the script under such a shell if you do have one."
   fi
   exit 1
 fi
@@ -612,7 +612,7 @@ PACKAGE_NAME='firejail'
 PACKAGE_TARNAME='firejail'
 PACKAGE_VERSION='0.9.73'
 PACKAGE_STRING='firejail 0.9.73'
-PACKAGE_BUGREPORT='netblue30@protonmail.com'
+PACKAGE_BUGREPORT='https://github.com/netblue30/firejail/issues'
 PACKAGE_URL='https://firejail.wordpress.com'
 
 ac_unique_file="src/firejail/main.c"
@@ -1446,7 +1446,7 @@ Some influential environment variables:
 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
 
-Report bugs to <netblue30@protonmail.com>.
+Report bugs to <https://github.com/netblue30/firejail/issues>.
 firejail home page: <https://firejail.wordpress.com>.
 _ACEOF
 ac_status=$?
@@ -5111,7 +5111,7 @@ Usage: $0 [OPTION]... [TAG]...
 Configuration files:
 $config_files
 
-Report bugs to <netblue30@protonmail.com>.
+Report bugs to <https://github.com/netblue30/firejail/issues>.
 firejail home page: <https://firejail.wordpress.com>."
 
 _ACEOF

configure.ac

@@ -12,8 +12,8 @@
 #
 
 AC_PREREQ([2.68])
-AC_INIT([firejail], [0.9.73], [netblue30@protonmail.com], [],
-    [https://firejail.wordpress.com])
+AC_INIT([firejail], [0.9.73], [https://github.com/netblue30/firejail/issues],
+    [], [https://firejail.wordpress.com])
 
 AC_CONFIG_SRCDIR([src/firejail/main.c])
 AC_CONFIG_MACRO_DIR([m4])