help for bfg's rain is in bfg's help now

…v2/v3 servers.

Developed against version: 2:4.7.6+dfsg~ubuntu-0ubuntu2.1

SMB2/3 support

Updated xhydra to support smb2

A compiler warning told me that buf was used uninitialised here and it
turned out that instead of buf2, buf was being used. It makes a lot more
sense to report buf2 and that happens to fix the warning as well.

modules: Remove various unused char *buf

hydra-vnc: Use buf2 instead of buf in hydra_report

For example on the Fedora 31 the path for the firebird include ibase.h is /usr/include/firebird/ibase.
This patch should also consider the firebird subdirectory inside the regular include directory.

Consider the /usr/include/firebird/ path for fb

Co-authored-by: Paramtamtam <7326800+tarampampam@users.noreply.github.com>

Hydra docker image

Create LICENSE.md

strcasestr is not a standard function and per
the man page, needs -D_GNU_SOURCE to be visible.

Fixes a build error:
```
hydra-rtsp.c:20:7: error: implicit declaration of function ‘strcasestr’; did you mean ‘strcasecmp’? [-Werror=implicit-function-declaration]
   20 |   if (strcasestr(s, "401 Unauthorized") != NULL) {
      |       ^~~~~~~~~~
      |       strcasecmp
```

Signed-off-by: Sam James <sam@gentoo.org>

Makefile.am: add -D_GNU_SOURCE for strcasestr