Remove use of English expletives

Remove words such as fuck, crap, shit etc.
Remove other potentially offensive words from comments.
Tidy up other geopolicital terms in comments.

deps/http-parser/http_parser.c

@@ -1744,7 +1744,7 @@ size_t http_parser_execute (http_parser *parser,
       case s_chunk_parameters:
       {
         assert(parser->flags & F_CHUNKED);
-        /* just ignore this shit. TODO check for overflow */
+        /* just ignore this. TODO check for overflow */
         if (ch == CR) {
           parser->state = s_chunk_size_almost_done;
           break;

deps/regex/regex_internal.h

@@ -63,7 +63,7 @@
 #endif
 #else /* GAWK */
 /*
- * This is a freaking mess. On glibc systems you have to define
+ * This is a mess. On glibc systems you have to define
  * a magic constant to get isblank() out of <ctype.h>, since it's
  * a C99 function.  To heck with all that and borrow a page from
  * dfa.c's book.