rtracklayer: openssl dependency version is hardcoded

[ScottNortonPhD]

System: Mac OS Catalina with Homebrew

How to reproduce:

$ brew install openssl  # as of 20 Apr 2020, installs openssl@1.1
$ R
> BiocManager::install("rtracklayer")

Expectation: the package will link against the latest available version of /usr/local/opt/openssl/lib/libssl.*-dylib.
Actual behavior: the package will link against /usr/local/opt/openssl/lib/libssl.1.0.0-dylib, even though libssl.1.1.dylib exists while libssl.1.0.0.dylib does not. Installation fails when loading from temporary location.

[ScottNortonPhD]

A temporary workaround is described in aisingapore/TagUI#635.