curl: add -I and -i to -h important

Closes #20483

docs/cmdline-opts/head.md

@@ -5,7 +5,7 @@ Long: head
 Short: I
 Help: Show document info only
 Protocols: HTTP FTP FILE
-Category: http ftp file
+Category: important http ftp file
 Added: 4.0
 Multi: boolean
 See-also:

docs/cmdline-opts/header.md

@@ -6,7 +6,7 @@ Short: H
 Arg: <header/@file>
 Help: Pass custom header(s) to server
 Protocols: HTTP IMAP SMTP
-Category: http imap smtp
+Category: important http imap smtp
 Added: 5.0
 Multi: append
 See-also:

src/tool_listhelp.c

@@ -266,10 +266,10 @@ const struct helptxt helptext[] = {
     CURLHELP_HTTP | CURLHELP_PROXY },
   { "-I, --head",
     "Show document info only",
-    CURLHELP_HTTP | CURLHELP_FTP | CURLHELP_FILE },
+    CURLHELP_IMPORTANT | CURLHELP_HTTP | CURLHELP_FTP | CURLHELP_FILE },
   { "-H, --header <header/@file>",
     "Pass custom header(s) to server",
-    CURLHELP_HTTP | CURLHELP_IMAP | CURLHELP_SMTP },
+    CURLHELP_IMPORTANT | CURLHELP_HTTP | CURLHELP_IMAP | CURLHELP_SMTP },
   { "-h, --help <subject>",
     "Get help for commands",
     CURLHELP_IMPORTANT | CURLHELP_CURL },

tests/data/data1461.txt

@@ -1,16 +1,18 @@
 Usage: curl [options...] <url>
- -d, --data <data>           HTTP POST data
- -f, --fail                  Fail fast with no output on HTTP errors
- -h, --help <subject>        Get help for commands
- -o, --output <file>         Write to file instead of stdout
- -O, --remote-name           Write output to file named as remote file
- -i, --show-headers          Show response headers in output
- -s, --silent                Silent mode
- -T, --upload-file <file>    Transfer local FILE to destination
- -u, --user <user:password>  Server user and password
- -A, --user-agent <name>     Send User-Agent <name> to server
- -v, --verbose               Make the operation more talkative
- -V, --version               Show version number and quit
+ -d, --data <data>            HTTP POST data
+ -f, --fail                   Fail fast with no output on HTTP errors
+ -I, --head                   Show document info only
+ -H, --header <header/@file>  Pass custom header(s) to server
+ -h, --help <subject>         Get help for commands
+ -o, --output <file>          Write to file instead of stdout
+ -O, --remote-name            Write output to file named as remote file
+ -i, --show-headers           Show response headers in output
+ -s, --silent                 Silent mode
+ -T, --upload-file <file>     Transfer local FILE to destination
+ -u, --user <user:password>   Server user and password
+ -A, --user-agent <name>      Send User-Agent <name> to server
+ -v, --verbose                Make the operation more talkative
+ -V, --version                Show version number and quit
 
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