GHA: spellcheck curl symbols better

This now makes sure to trim off exact matches for curl symbols and long
curl commanad line options instead of using pattern matching as before.
This should catch typoed names (that still follow the pattern) better.

The cleanspell.pl script is no longer used. cleancmd.pl is used for all
markdown files.

Closes #16504

.github/scripts/spellcheck.curl

@@ -0,0 +1,151 @@
+# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+#
+# common variable types + structs
+# callback typedefs
+# public functions names
+# some man page names
+curl_fileinfo
+curl_forms
+curl_hstsentry
+curl_httppost
+curl_index
+curl_khkey
+curl_pushheaders
+curl_waitfd
+CURLcode
+CURLformoption
+CURLHcode
+CURLMcode
+CURLMsg
+CURLSHcode
+CURLUcode
+curl_calloc_callback
+curl_chunk_bgn_callback
+curl_chunk_end_callback
+curl_conv_callback
+curl_debug_callback
+curl_fnmatch_callback
+curl_formget_callback
+curl_free_callback
+curl_hstsread_callback
+curl_hstswrite_callback
+curl_ioctl_callback
+curl_malloc_callback
+curl_multi_timer_callback
+curl_opensocket_callback
+curl_prereq_callback
+curl_progress_callback
+curl_push_callback
+curl_read_callback
+curl_realloc_callback
+curl_resolver_start_callback
+curl_seek_callback
+curl_socket_callback
+curl_sockopt_callback
+curl_ssl_ctx_callback
+curl_strdup_callback
+curl_trailer_callback
+curl_write_callback
+curl_xferinfo_callback
+curl_strequal
+curl_strnequal
+curl_mime_init
+curl_mime_free
+curl_mime_addpart
+curl_mime_name
+curl_mime_filename
+curl_mime_type
+curl_mime_encoder
+curl_mime_data
+curl_mime_filedata
+curl_mime_data_cb
+curl_mime_subparts
+curl_mime_headers
+curl_formadd
+curl_formget
+curl_formfree
+curl_getdate
+curl_getenv
+curl_version
+curl_easy_escape
+curl_escape
+curl_easy_unescape
+curl_unescape
+curl_free
+curl_global_init
+curl_global_init_mem
+curl_global_cleanup
+curl_global_trace
+curl_global_sslset
+curl_slist_append
+curl_slist_free_all
+curl_getdate
+curl_share_init
+curl_share_setopt
+curl_share_cleanup
+curl_version_info
+curl_easy_strerror
+curl_share_strerror
+curl_easy_pause
+curl_easy_ssls_import
+curl_easy_ssls_export
+curl_easy_init
+curl_easy_setopt
+curl_easy_perform
+curl_easy_cleanup
+curl_easy_getinfo
+curl_easy_duphandle
+curl_easy_reset
+curl_easy_recv
+curl_easy_send
+curl_easy_upkeep
+curl_easy_header
+curl_easy_nextheader
+curl_mprintf
+curl_mfprintf
+curl_msprintf
+curl_msnprintf
+curl_mvprintf
+curl_mvfprintf
+curl_mvsprintf
+curl_mvsnprintf
+curl_maprintf
+curl_mvaprintf
+curl_multi_init
+curl_multi_add_handle
+curl_multi_remove_handle
+curl_multi_fdset
+curl_multi_waitfds
+curl_multi_wait
+curl_multi_poll
+curl_multi_wakeup
+curl_multi_perform
+curl_multi_cleanup
+curl_multi_info_read
+curl_multi_strerror
+curl_multi_socket
+curl_multi_socket_action
+curl_multi_socket_all
+curl_multi_timeout
+curl_multi_setopt
+curl_multi_assign
+curl_multi_get_handles
+curl_pushheader_bynum
+curl_pushheader_byname
+curl_multi_waitfds
+curl_easy_option_by_name
+curl_easy_option_by_id
+curl_easy_option_next
+curl_url
+curl_url_cleanup
+curl_url_dup
+curl_url_get
+curl_url_set
+curl_url_strerror
+curl_ws_recv
+curl_ws_send
+curl_ws_meta
+libcurl-env
+libcurl-ws