Fix CWE-190 - DoS could happen with a specially crafted boundary parameter in a multipart request #841

Job	Run time
ESP32 (arduino-cli) - Dev	26m 57s
ESP32 (arduino-cli) - Release	30m 27s
ESP32 (pio) - Arduino 2 (esp32-s3-devkitc-1)	14m 6s
ESP32 (pio) - Arduino 2 (esp32-c3-devkitc-02)	12m 40s
ESP32 (pio) - Specific Envs (ci-no-json)	24m 11s
ESP32 (pio) - Specific Envs (ci-no-chunk-inflight)	25m 38s
ESP32 (pio) - Specific Envs (ci-arduino-2-esp-idf-log)	13m 50s
ESP32 (pio) - Specific Envs (ci-arduino-3-esp-idf-log)	26m 51s
ESP32 (pio) - Arduino 2 (esp32-s2-saola-1)	14m 8s
ESP32 (pio) - Specific Envs (ci-regex)	28m 21s
ESP32 (pio) - Arduino 3 (esp32-s2-saola-1)	21m 9s
ESP32 (pio) - Arduino 3 (esp32-s3-devkitc-1)	24m 38s
ESP32 (pio) - Arduino 3 (esp32-p4)	27m 37s
ESP32 (pio) - Arduino 2 (esp32dev)	13m 30s
ESP32 (pio) - Specific Envs (ci-latest-asynctcp)	22m 27s
ESP32 (pio) - Arduino 3 (esp32dev)	26m 0s
ESP32 (pio) - Arduino 3 (esp32-c3-devkitc-02)	26m 6s
ESP32 (pio) - Arduino 3 (esp32-c6-devkitc-1)	26m 10s
ESP32 (pio) - Arduino 3 (esp32-h2-devkitm-1)	20m 59s
	7h 5m 45s

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