uk-k5(99) variant

Updated comment to foldable. Referred DTCS and CTCSS tone codes to the chirp_common as they are the same. Made a bunch of other changes but reverted.
Added a registered radio variant with the firmward code of my handset only.
Tested it with connect radio, download memories (ca. 10 of), replace memories (ca. 125 of - repeaters, marine, pmr, etc), wrote to radio.
Radio still works so far.

chirp/drivers/uvk5.py

@@ -1,29 +1,30 @@
-# Quansheng UV-K5 driver (c) 2023 Jacek Lipkowski <sq5bpf@lipkowski.org>
-#
-# based on template.py Copyright 2012 Dan Smith <dsmith@danplanet.com>
-#
-#
-# This is a preliminary version of a driver for the UV-K5
-# It is based on my reverse engineering effort described here:
-# https://github.com/sq5bpf/uvk5-reverse-engineering
-#
-# Warning: this driver is experimental, it may brick your radio,
-# eat your lunch and mess up your configuration.
-#
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
+"""
+    # Quansheng UV-K5 driver (c) 2023 Jacek Lipkowski <sq5bpf@lipkowski.org>
+    #
+    # based on template.py Copyright 2012 Dan Smith <dsmith@danplanet.com>
+    #
+    #
+    # This is a preliminary version of a driver for the UV-K5
+    # It is based on my reverse engineering effort described here:
+    # https://github.com/sq5bpf/uvk5-reverse-engineering
+    #
+    # Warning: this driver is experimental, it may brick your radio,
+    # eat your lunch and mess up your configuration.
+    #
+    #
+    # This program is free software: you can redistribute it and/or modify
+    # it under the terms of the GNU General Public License as published by
+    # the Free Software Foundation, either version 2 of the License, or
+    # (at your option) any later version.
+    #
+    # This program is distributed in the hope that it will be useful,
+    # but WITHOUT ANY WARRANTY; without even the implied warranty of
+    # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    # GNU General Public License for more details.
+    #
+    # You should have received a copy of the GNU General Public License
+    # along with this program.  If not, see <http://www.gnu.org/licenses/>.
+    """
 
 import struct
 import logging
@@ -272,29 +273,11 @@
 TONE_RDCS = 3
 
 
-CTCSS_TONES = [
-    67.0, 69.3, 71.9, 74.4, 77.0, 79.7, 82.5, 85.4,
-    88.5, 91.5, 94.8, 97.4, 100.0, 103.5, 107.2, 110.9,
-    114.8, 118.8, 123.0, 127.3, 131.8, 136.5, 141.3, 146.2,
-    151.4, 156.7, 159.8, 162.2, 165.5, 167.9, 171.3, 173.8,
-    177.3, 179.9, 183.5, 186.2, 189.9, 192.8, 196.6, 199.5,
-    203.5, 206.5, 210.7, 218.1, 225.7, 229.1, 233.6, 241.8,
-    250.3, 254.1
-]
+CTCSS_TONES = chirp_common.TONES # yes they were an exact match.
 
 # lifted from ft4.py
-DTCS_CODES = [
-    23,  25,  26,  31,  32,  36,  43,  47,  51,  53,  54,
-    65,  71,  72,  73,  74,  114, 115, 116, 122, 125, 131,
-    132, 134, 143, 145, 152, 155, 156, 162, 165, 172, 174,
-    205, 212, 223, 225, 226, 243, 244, 245, 246, 251, 252,
-    255, 261, 263, 265, 266, 271, 274, 306, 311, 315, 325,
-    331, 332, 343, 346, 351, 356, 364, 365, 371, 411, 412,
-    413, 423, 431, 432, 445, 446, 452, 454, 455, 462, 464,
-    465, 466, 503, 506, 516, 523, 526, 532, 546, 565, 606,
-    612, 624, 627, 631, 632, 654, 662, 664, 703, 712, 723,
-    731, 732, 734, 743, 754
-]
+DTCS_CODES = chirp_common.DTCS_CODES # yes, they were an exact match also
+
 
 FLOCK_LIST = ["Off", "FCC", "CE", "GB", "430", "438"]
 
@@ -2083,3 +2066,15 @@ class RA79Radio(UVK5Radio):
     """Retevis RA79"""
     VENDOR = "Retevis"
     MODEL = "RA79"
+
+# EI2081  
+# This is from a radio i purchased from AliExperess store "Eagle Store" 
+# which was quoted as both "Quansheng UV-K6" (in title) and "Quansheng UV-K5(99)" in the imagery.
+# I'm not 100% sure it's legit Quansheng!
+@directory.register
+class UVK5_99_Radio(UVK5Radio):
+    MODEL = "UV-K5(99)"
+    @classmethod
+    def k5_approve_firmware(cls, firmware):
+        approved_prefixes = ('OSFW-bd90ca3')
+        return any(firmware.startswith(x) for x in approved_prefixes)