Add Release Notes for v1.17.5

WHATSNEW.md

@@ -1,3 +1,26 @@
+osTicket v1.17.5
+================
+### Improvements
+* update: README.md PHP & Laminas (4baf9dc8, 555c4a74, 88294e2d, 30a4a6e9)
+* issue: putenv() Disabled (3c0d5f47)
+* i18n: Update Signing (98706274, 776c0f27)
+* i18n: Flags Position & Codes (3ee11112, 45f5b5b4)
+* mailer: Undefined SmtpAccount::getName() (560a4f1d)
+* issue: SystemSessionHandler (7e17daa6)
+* issue: Status List Overflow (1deee342)
+* faq: Category Notes Images (ccca0f59)
+* patches: Latest 10/03/2023 (65e12297, 48e8501d, a8d42a9d, 4475e03e, bd034712, 64b8c81d, 070eefcb, 1775ce75)
+* mail: NoValidateCert (d3c140ce)
+* issue: Choice/Selection Field Searches (00e22fad)
+* stubs: Add stubs to pass lint test (895c7236)
+* issue: Canned Response Inline Images (a503c160)
+* format: Viewable Images Bug (2a412883)
+
+### Security
+* issue: CSP Headers (6228f640)
+* security: Latest Vulns 09/2023 (04f4e611, 88a87a33, c4ad48de, 37cf8350)
+* issue: User Account Creation (777e6f0b)
+
 osTicket v1.17.4
 ================
 ### Improvements