message: Fix incorrect html entities parsing in ZNCString.cpp
  This PR fixes wrong size argument passed to `strncasecmp` function when it was invoked to check if the string contains HTML entities.
diff: @@ -294,13 +294,13 @@ CString CString::Escape_n(EEscape eFrom, EEscape eTo) const {
  }
  if (ch == 0) {
  - if (!strncasecmp((const char*)&pTmp, "&lt;", 2))
  + if (!strncasecmp((const char*)&pTmp, "&lt;", 4))
  ch = '<';
  - else if (!strncasecmp((const char*)&pTmp, "&gt;", 2))
  + else if (!strncasecmp((const char*)&pTmp, "&gt;", 4))
  ch = '>';
  - else if (!strncasecmp((const char*)&pTmp, "&quot;", 4))
  + else if (!strncasecmp((const char*)&pTmp, "&quot;", 6))
  ch = '"';
  - else if (!strncasecmp((const char*)&pTmp, "&amp;", 3))
  + else if (!strncasecmp((const char*)&pTmp, "&amp;", 5))
  ch = '&';
  }
  