setopt: enable CURLOPT_IGNORE_CONTENT_LENGTH for hyper

Since this option is also used for FTP, it needs to work to set for
applications even if hyper doesn't support it for HTTP. Verified by test
1137.

Updated docs to specify that the option doesn't work for HTTP when using
the hyper backend.

Closes #7614

docs/cmdline-opts/ignore-content-length.d

@@ -10,4 +10,4 @@ files larger than 2 gigabytes.
 For FTP (since 7.46.0), skip the RETR command to figure out the size before
 downloading a file.
 
-This option doesn't work if libcurl was built to use hyper for HTTP.
+This option doesn't work for HTTP if libcurl was built to use hyper.

docs/libcurl/opts/CURLOPT_IGNORE_CONTENT_LENGTH.3

@@ -61,7 +61,7 @@ if(curl) {
 .fi
 .SH AVAILABILITY
 Added in 7.14.1. Support for FTP added in 7.46.0. This option is not working
-for the hyper backend.
+for HTTP when libcurl is built to use the hyper backend.
 .SH RETURN VALUE
 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
 .SH "SEE ALSO"

lib/setopt.c

@@ -2370,12 +2370,8 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
     break;
 
   case CURLOPT_IGNORE_CONTENT_LENGTH:
-#ifndef USE_HYPER
     data->set.ignorecl = (0 != va_arg(param, long)) ? TRUE : FALSE;
     break;
-#else
-    return CURLE_NOT_BUILT_IN;
-#endif
 
   case CURLOPT_CONNECT_ONLY:
     /*

tests/data/DISABLED

@@ -86,7 +86,6 @@
 1129
 1130
 1131
-1137
 1144
 1156
 1160