Smack did this for a long time, since eb56f8a55 ("GSSAPI work by Jay
Kline (SMACK-218)."). Not always in a static block though. But
irregardless this is bad practice as it causes side-effects and may
overrides settings.
For example, one users reports:
java.lang.SecurityException: java.io.IOException: gss.conf (No such file or directory)
at sun.security.provider.ConfigFile$Spi.<init>(ConfigFile.java:137)
at sun.security.provider.ConfigFile.<init>(ConfigFile.java:102)
at sun.reflect.GeneratedConstructorAccessor119.newInstance(Unknown Source)