Mucommander 0.9.3-3 was released in January 2019.
* comment out `proguard.enabled = ...` in build.gradle
* use Gradle 4.10 (upstream uses 4.8)
* fix version in build.gradle
Fixes build errors for the third-party mongoose module:
```
In file included from
/nix/store/r5s3w32ahjzdlzsfrhybc3l2qcpi6yb2-libpcap-1.9.0/include/pcap.h:43,
from /build/ntopng-2.0/include/ntop_includes.h:93,
from src/HTTPserver.cpp:22:
/nix/store/r5s3w32ahjzdlzsfrhybc3l2qcpi6yb2-libpcap-1.9.0/include/pcap/pcap.h:958: note: this is the location of the previous definition
#define INVALID_SOCKET -1
src/../third-party/mongoose/mongoose.c:270:13: error: multiple types in one declaration
typedef int SOCKET;
^~~~~~
```
The go modules utilized by the project and the vendored dependencies already
diverged, so the nix build of `wtf` was slightly out-of-date regarding the
official binary.
The gocenter proxy provides "immutable re-usable Go modules" which should avoid
the problem of any dependency suddenly vanishing.
Claudio Bley