OpenSSL: Goodbye ssl2

Kills SSL2 from OpenSSL, and force rebuilds all formula that currently hooks into OpenSSL. Currently there's a merge conflict, which I thought I'd caught but I'll go back through and find it and submit another commit that unclogs the merge conflict.

**Not in main Homebrew. Locate & Revision to follow soon**:
```
openssh
erlang-r16
mongodb24
postgresql8
postgresql9
postgresql91
postgresql92
ruby182
ruby186
ruby20
shairport
subversion17
```

**Known Merge Conflicts To Resolve**:

```
Subversion
mongodb
python
wrk
```