spacecheck.pl: drop more exceptions

- replace ß (scharfes S) with links.
- replace § (section sign) with links.
- replace 🙏 emoji with `🙏`.
 Supported by GitHub, Forgejo/Gitea and most likely GitLab.
- docs/libcurl/curl_mprintf.md: replace Unicode ± with `{+|-}`.
- docs/CIPHERS.md: URL encode Unicode in URLs.
- lib1560: use hex encoding in `räksmörgås.se`.
- unit1307: use hex encoding in `Lindmätarv`.
- drop LATIN SMALL LETTER A WITH ACUTE exception.
  No longer appears in tests.

This leaves the single character exception: `ö`
And file exceptions holding contributor names.

Follow-up to 9243ed59b3 #17329
Follow-up to 838dc53bb7 #17247

Closes #17335

tests/libtest/lib1560.c

@@ -202,14 +202,20 @@ static const struct testcase get_parts_list[] ={
    "| [16] | [17]",
    0, CURLU_URLDECODE, CURLUE_OK },
 #ifdef USE_IDN
-  {"https://räksmörgås.se",
+  /*
+    https://sv.wikipedia.org/wiki/R%c3%a4ksm%c3%b6rg%c3%a5s
+    https://codepoints.net/U+00E4 Latin Small Letter A with Diaeresis
+    https://codepoints.net/U+00F6 Latin Small Letter O with Diaeresis
+    https://codepoints.net/U+00E5 Latin Small Letter A with Ring Above
+  */
+  {"https://r\xc3\xa4ksm\xc3\xb6rg\xc3\xa5s.se",
    "https | [11] | [12] | [13] | xn--rksmrgs-5wao1o.se | "
    "[15] | / | [16] | [17]", 0, CURLU_PUNYCODE, CURLUE_OK},
   {"https://xn--rksmrgs-5wao1o.se",
-   "https | [11] | [12] | [13] | räksmörgås.se | "
+   "https | [11] | [12] | [13] | r\xc3\xa4ksm\xc3\xb6rg\xc3\xa5s.se | "
    "[15] | / | [16] | [17]", 0, CURLU_PUNY2IDN, CURLUE_OK},
 #else
-  {"https://räksmörgås.se",
+  {"https://r\xc3\xa4ksm\xc3\xb6rg\xc3\xa5s.se",
    "https | [11] | [12] | [13] | [30] | [15] | / | [16] | [17]",
    0, CURLU_PUNYCODE, CURLUE_OK},
 #endif
@@ -619,7 +625,7 @@ static const struct urltestcase get_url_list[] = {
    "",
    0, 0, CURLUE_BAD_PORT_NUMBER},
 #ifdef USE_IDN
-  {"https://räksmörgås.se/path?q#frag",
+  {"https://r\xc3\xa4ksm\xc3\xb6rg\xc3\xa5s.se/path?q#frag",
    "https://xn--rksmrgs-5wao1o.se/path?q#frag", 0, CURLU_PUNYCODE, CURLUE_OK},
 #endif
   /* unsupported schemes with no guessing enabled */

tests/unit/unit1307.c

@@ -243,7 +243,8 @@ static const struct testcase tests[] = {
   { "?*?*?.?",                  "abcdef.c",               MATCH },
   { "?*?*?.?",                  "abcdef.cd",              NOMATCH },
 
-  { "Lindmätarv",               "Lindmätarv",             MATCH },
+  /* https://codepoints.net/U+00E4 Latin Small Letter A with Diaeresis */
+  { "Lindm\xc3\xa4tarv",        "Lindm\xc3\xa4tarv",      MATCH },
 
   { "",                         "",                       MATCH},
   {"**]*[*[\x13]**[*\x13)]*]*[**[*\x13~r-]*]**[.*]*[\xe3\xe3\xe3\xe3\xe3\xe3"