libcurl-docs: cleanups

libcurl-docs: cleanups

 CURLMOPT_SOCKETDATA.md: fix typo
 CURLMOPT_TIMERDATA.md: fix typo
 CURLOPT_COOKIELIST.m: quote strings
 CURLOPT_PREREQFUNCTION.md: quote variable names
 CURLOPT_TCP_NODELAY.md: rephrased to please spell checker
 CURLOPT_WILDCARDMATCH.md: rephrased
 libcurl-tutorial.md: use correct option name
 curl_global_init_mem.md: quote headers
 curl_easy_getinfo.md: use correct symbol names in headers
 curl_global_trace.md: quote some headers
 curl_ws_meta.md: quote struct field names
 libcurl-env.md: quote headers