etc/apt: add c9f2 configs

etc/apt/apt.conf.c9f2

+/*
+ * This is the main configuration file for the APT suite of tools,
+ * see apt.conf(5) for details.
+ */
+
+Dir::Etc::main "/dev/null";
+Dir::Etc::parts "/var/empty";
+Dir::Etc::SourceParts "/var/empty";
+
+Dir::Etc::sourcelist "/etc/eterbuild/apt/sources.list.c9f2";

etc/apt/sources.list.c9f2

+# Package repository URLs
+#
+# You can add [alt] after rpm for digital signature check
+
+rpm file:/var/ftp/ pub/ALTLinux/c9f2/branch/i586 classic
+rpm file:/var/ftp/ pub/ALTLinux/c9f2/branch/noarch classic
+rpm file:/var/ftp/ pub/ALTLinux/c9f2/branch/x86_64-i586 classic
+
+#rpm [etersoft] file:/var/ftp/ pub/Etersoft/LINUX@Etersoft/c9f2/branch/i586 addon
+#rpm [etersoft] file:/var/ftp/ pub/Etersoft/LINUX@Etersoft/c9f2/branch/noarch addon
+#rpm [etersoft] file:/var/ftp/ pub/Etersoft/LINUX@Etersoft/c9f2/branch/x86_64-i586 addon