Slightly tweak error when unable to bind port

A slight improvement over 2d2d8fae3d8bc4e82dc631d93c6e19f954bbee04 -- we don't know that it's the daemon, it could be the GUI.
Adjust branding in datadir lock error message
Merge pull request #3806

9e2872c Adjust branding in datadir lock error message (Michagogo)
d30d379 Slightly tweak error when unable to bind port (Michagogo)
qt: translation update
Merge pull request #3924

7885907 qt: translation update (Wladimir J. van der Laan)
Update gitian README.md
doc: version bump Doxyfile

- bump version to 0.9.99
- exclude leveldb and json
- include call and caller graphs in the documentation.
Merge pull request #3926

c337e2e Update gitian README.md (Wladimir J. van der Laan)
Remove stale and redundant src/.gitignore file

This commit removes completely the src/.gitignore file, given that the
precedent for ignoring artifacts within the `src` directory is to
add entries for them to the root .gitignore file.

Note also that the lone entry in src/.gitignore is stale anyway. As of
the switch to Autotools in 35b8af9, the build no longer build creates
artifacts in `src/test_bitcoin`. They are now written to
`src/test/test_bitcoin`, and this latter path is already ignored in the
root .gitignore file.
Merge pull request #3938

6540025 Remove stale and redundant src/.gitignore file (Chris Beams)