HTTPD: Array access out of bounds

[Erik Schnetter]

Building HTTPD I see these warnings:

In function 'StringSetToBuffer',
    inlined from 'StringSetToBuffer' at /home/eschnetter/Cactus/arrangements/CactusConnect/HTTPD/src/SString.c:268:1,
    inlined from 'StringSetToCString' at /home/eschnetter/Cactus/arrangements/CactusConnect/HTTPD/src/SString.c:226:10:
/home/eschnetter/Cactus/arrangements/CactusConnect/HTTPD/src/SString.c:273:7: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
  273 |       strncpy( s->chars, buf, len );
      |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/eschnetter/Cactus/arrangements/CactusConnect/HTTPD/src/SString.c: In function 'StringSetToCString':
/home/eschnetter/Cactus/arrangements/CactusConnect/HTTPD/src/SString.c:226:10: note: length computed here
  226 |   return StringSetToBuffer( s, c_string, strlen( c_string ) );
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

and

In function 'String_Copy',
    inlined from 'StringInsert' at /home/eschnetter/Cactus/arrangements/CactusConnect/HTTPD/src/SString.c:396:26:
/home/eschnetter/Cactus/arrangements/CactusConnect/HTTPD/src/SString.c:125:3: warning: 'memcpy' offset [0, 2] is out of the bounds [0, 0] [-Warray-bounds=]
  125 |   memcpy( s->line_end, other->line_end, LINE_END_BUFSIZE
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  126 |           * sizeof( SSCHAR ) );
      |           ~~~~~~~~~~~~~~~~~~~~

These look serious.