Allow wallet file to be a symlink, as was the case before v0.15.0

[mmgen]

No description provided.

[jnewbery]

NACK. Please see discussion here: #10885 (comment) for why this unintended behaviour was removed.

In general, PRs without a description are unlikely to get much sympathy/review.

If you need flexibility in where your wallet files are kept, you may wish to help with reviewing #11687

[ryanofsky]

I don't think we can do this because of concerns that storing the berkeleydb data file separately from berkeleydb log files (in database/log.*) could lead to data and funds loss. With 0.16 it will be possible to specify a -walletdir= option to bitcoind that can be a symlink. Also #11687, which is not scheduled to be merged before 0.16 is branched, will restore the option for individual wallets to be symlinks (to directories).

[maflcko]

With 0.16 it will be possible to specify a -walletdir= option to bitcoind that can be a symlink.

I'd suggest to close this pull, then.

[mmgen]

With 0.16 it will be possible to specify a -walletdir= option to bitcoind that can be a symlink.

Fine, this answers my needs (just compiled from master and tried it out) and is actually a much better solution than the symlink. Closing the PR. Thanks all for the helpful information.