Add info, settings, and firmware for ONT Leox LXT-240G-C1 (#295)

* Add LEOX LXT-240G-C1 basic information

* Add firmware links and instructions how to change clone settings for LEOX LXT-240G-C1

* Rename and rearrange ONT Leox LXT-240G-C1 commands according to template

_ont/ont-leox-lxt-240g-c1.md

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+---
+title: LEOX LXT-240G-C1
+has_children: false
+layout: default
+parent: LEOX
+---
+
+# Hardware Specifications
+
+|                 |                                                                        |
+| --------------- | ---------------------------------------------------------------------- |
+| Vendor/Brand    | LEOX                                                                   |
+| Model           | LXT-240G-C1                                                            |
+| Chipset         | Realtek RTL9607C                                                       |
+| Flash           | SPI NAND 256MB                                                         |
+| RAM             | 196MB visible in top (256MB total?)                                    |
+| CPU             | Formosa MIPS interAptiv (multi) V2.0                                   |
+| CPU Clock       | 300MHz (597.60 BogoMIPS)                                               |
+| System          | Linux 4.4.140 (GCC Realtek MSDK-4.8.5p1 Build 3068)                    |
+| Ethernet ports  | 4x1G                                                                   |
+| POTS ports      | 2xRJ11                                                                 |
+| Optics          | SC/APC                                                                 |
+| IP address      | 192.168.1.1/24                                                         |
+| Web Gui         | ✅ user `admin`, password `letmein` OR user `user`, password `user`    |
+| Telnet          | ✅ user `leox`, password `leolabs_7`                                   |
+| SSH             | NO                                                                     |
+| Form Factor     | ONT                                                                    |
+
+# External Photos
+
+{% include image.html file="ont-leox-lxt-240g-c1_top.jpg" alt="Leox LXT-240G-C1 Top" caption="Leox LXT-240G-C1 Top" %} 
+{% include image.html file="ont-leox-lxt-240g-c1_bottom.jpg" alt="Leox LXT-240G-C1 Bottom" caption="Leox LXT-240G-C1 Bottom" %}
+{% include image.html file="ont-leox-lxt-240g-c1_pcb.jpg" alt="Leox LXT-240G-C1 PCB" caption="Leox LXT-240G-C1 PCB" %}
+
+## List of partitions (MTD)
+
+| dev   | size     | erasesize | name             |
+| ----- | -------- | --------- | ---------------- |
+| mtd0  | 000c0000 | 00020000  | "boot"           |
+| mtd1  | 00020000 | 00020000  | "env"            |
+| mtd2  | 00020000 | 00020000  | "env2"           |
+| mtd3  | 00040000 | 00020000  | "static_conf"    |
+| mtd4  | 0f9c0000 | 00020000  | "ubi_device"     |
+| mtd5  | 00a89000 | 0001f000  | "ubi_Config"     |
+| mtd6  | 00a0d000 | 0001f000  | "ubi_k0"         |
+| mtd7  | 01911000 | 0001f000  | "ubi_r0"         |
+| mtd8  | 00a0d000 | 0001f000  | "ubi_k1"         |
+| mtd9  | 01911000 | 0001f000  | "ubi_r1"         |
+| mtd10 | 0081d000 | 0001f000  | "ubi_framework1" |
+| mtd11 | 0081d000 | 0001f000  | "ubi_framework2" |
+| mtd12 | 02416000 | 0001f000  | "ubi_apps"       |
+
+Only the first 4 partitions with erasesize 0x20000 should be manipulated using mtd devices, the fifth partition `ubi_device` contains the rest of the NAND and is to be manipulated using ubi volumes
+
+## List of volumes (UBI)
+
+| dev    | size      | type    | name             |
+| ------ | --------- | ------- | ---------------- |
+| ubi0_0 | 11046912B | dynamic | "ubi_Config"     |
+| ubi0_1 | 10539008B | dynamic | "ubi_k0"         |
+| ubi0_2 | 26284032B | dynamic | "ubi_r0"         |
+| ubi0_3 | 10539008B | dynamic | "ubi_k1"         |
+| ubi0_4 | 26284032B | dynamic | "ubi_r1"         |
+| ubi0_5 |  8507392B | dynamic | "ubi_framework1" |
+| ubi0_6 |  8507392B | dynamic | "ubi_framework2" |
+| ubi0_7 | 37838848B | dynamic | "ubi_apps"       |
+
+To back up a volume, `cat` or `dd` the appropriate `/dev/ubi0_X` device to a file or pipe, to restore a volume, use the `ubiupdatevol` utility (or just do it safely via the WebGUI)
+
+This ONT supports dual boot.
+
+Volumes `ubi_k0` and `ubi_r0` respectively contain kernel and rootfs of the first image, while `ubi_k1` and `ubi_r1` contain kernel and rootfs of the second one.
+
+## List of software versions
+
+- [V4.1.1L5rc2](https://mega.nz/file/YJkEGCIC#FNdE6Xt6lsFJdOnx3GGGCNi4fpMoN0QFOf5_1VjcGHo){: .btn } md5hash: 53b80abbda413e3ebc87d1730292d2fd
+- [V4.1.1L5](https://mega.nz/file/VMtTkLDI#5tZ74mAAqn0PhGa4MtbEliSo4B0VwIo28K_8iV2AzQ0){: .btn } md5hash: 5426cac6eb204ec1b3a8f39bc22d9488, same as rc2 just marked final
+
+# GPON/OMCI settings
+
+## Set OMCI mode to customized so versions don't reset
+```
+mib set OMCI_OLT_MODE 3
+```
+
+## Setting OMCI software version (ME 7)
+```
+mib set OMCI_SW_VER1 YOURSWVER
+mib set OMCI_SW_VER2 YOURSWVER
+```
+
+## Setting OMCI vendor ID (ME 256)
+```
+flash set PON_VENDOR_ID VEND
+```
+
+## Setting ONU GPON Serial Number
+```
+flash set GPON_SN VEND1234ABCD
+```
+
+## Setting OMCI hardware version (ME 256)
+```
+flash set HW_HWVER YOURHWVER
+```
+
+## Setting OMCC version (ME 257)
+```
+mib set OMCC_VER 0x86
+```
+
+## Setting OMCI equipment ID (ME 257)
+```
+flash set GPON_ONU_MODEL YOUREQUIPMENTID
+```
+
+## Setting Product Code (ME 257)
+```
+mib set OMCI_VENDOR_PRODUCT_CODE 0x3032
+```
+
+## Setting VEIP slot ID (example for 0xe01)
+```
+mib set OMCI_VEIP_SLOT_ID 0xe
+```
+
+# Verification commands for settings changed above (all settings take a reboot to apply)
+
+## Verify SwVer (ME 7)
+```
+omcicli mib get 7
+```
+
+## Verify Vendor ID, HwVer, and G984 Serial (ME 256)
+```
+omcicli mib get 256
+```
+
+## Verify OMCC version, Equipment ID and Product Code (ME 257)
+```
+omcicli mib get 257
+```
+
+## Verify VEIP customized slot ID (ME 329)
+```
+omcicli mib get 329
+```
+
+# Advanced settings
+
+## Setting management IP
+```
+mib set LAN_IP_ADDR 192.168.102.1
+```