openconnect: fix --HEAD to report proper version

openconnect ships with a version.sh script to determine the current version,
but it expects to run from within a clean git clone, which it determines in
part by checking for [-d .git]. For it to work properly we need to:

1. symlink to the git clone (so that the [-d .git] test works).
2. clone without --shallow (so that git describe can find a proper tag)
3. copy autogen.sh before modifying it (so that the checkout isn't dirty)

Signed-off-by: Jay Soffian <jaysoffian@gmail.com>
openconnect: use brewed openssl

While using openconnect on OS X 10.9.2, I noticed it was spewing the following
message every minute after connecting:

    DTLS handshake failed: 1
    90555:error:14102410:SSL routines:DTLS1_READ_BYTES:sslv3 alert
      handshake failure:
      /SourceCache/OpenSSL098/OpenSSL098-50/src/ssl/d1_pkt.c:
      1037:SSL alert number 40
    ...

This turns out to be a bug in openssl <= 1.0.1e, per
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=701826 and

Switch to brew's openssl (1.0.1f at this moment) to pick up the bugfix.

Signed-off-by: Jay Soffian <jaysoffian@gmail.com>
openconnect 5.99

Signed-off-by: Jay Soffian <jaysoffian@gmail.com>

Closes #27225.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
openconnect: add 5.99 bottle.

Closes #27225.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>