Fix typos and update codespell configuration

* Fix typos.
 * Add words that are not typos to codespell's ignore words list and
 ignore regex.
 * Make codespell ignore URIs.
 * Make `make doublecheck` throw no error.

Signed-off-by: Daniel Santos <dacs.git@brilhante.top>

src/log.c

@@ -105,7 +105,7 @@ _rotate_log_file(void)
     log_info("Log has been rotated");
 }
 
-// abbreviation string is the prefix thats used in the log file
+// abbreviation string is the prefix that's used in the log file
 static char*
 _log_abbreviation_string_from_level(log_level_t level)
 {

src/xmpp/vcard.c

@@ -297,7 +297,7 @@ vcard_parse(xmpp_stanza_t* vcard_xml, vCard* vcard)
             element->nickname = stanza_text_strdup(child_pointer);
 
             if (!element->nickname) {
-                // Invaild element, free and do not push
+                // Invalid element, free and do not push
                 free(element);
                 continue;
             }