Bug#912458: jftp FTBFS with OpenJDK 11

[Adrian Bunk]

Source: jftp
Version: 1.60+dfsg-2
Severity: serious
Tags: ftbfs buster sid

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/jftp.html

...
compile:
    [javac] /build/1st/jftp-1.60+dfsg/build.xml:68: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Compiling 125 source files to /build/1st/jftp-1.60+dfsg/build/classes
    [javac] /build/1st/jftp-1.60+dfsg/src/java/net/sf/jftp/util/JReciever.java:95: error: cannot find symbol
    [javac]         reciever.destroy();
    [javac]                 ^
    [javac]   symbol:   method destroy()
    [javac]   location: variable reciever of type Thread
    [javac] Note: Some input files use or override a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 1 error

BUILD FAILED
/build/1st/jftp-1.60+dfsg/build.xml:68: Compile failed; see the compiler error output for details.

Total time: 5 seconds
dh_auto_build: ant -Duser.name debian -Dant.build.javac.source=1.6 -Dant.build.javac.target=1.6 jars returned exit code 1
make[1]: *** [debian/rules:11: override_dh_auto_build] Error 2