Duplicate code in `src/core/settings.c`

[saikat107]

Source

1. In src/core/settings.c, Lines 530-533 and Lines 534-537 are exactly the same.
2. Lines 90-92 and Lines 93-95 are almost the same, except in the line 95 Settings->TlsClientMaxSendBuffer is set to QUIC_MAX_TLS_SERVER_SEND_BUFFER (which was previously set to QUIC_MAX_TLS_CLIENT_SEND_BUFFER.