CURLE_SETOPT_OPTION_SYNTAX: new return code for wrong setopt syntax #7175
For options that pass in lists or strings that are subsequently parsed
Maybe for #7174 for example?
For options that pass in lists or strings that are subsequently parsed and must be correct. This broadens the scope for the option previously known as CURLE_TELNET_OPTION_SYNTAX but the old name is of course still provided as a #define for existing applications.