Tasks derrived from #205

[masatake]

• [linux] make the test driver detect btrfs and warn if the fs is used as the test platform
• introduce a template for issue (4.95.0: test suite is failing #205 (comment)) (github: add issue templates #227)

[kloczek]

Looks like test suite still is failing on btrfs

+ /usr/bin/make -O -j48 V=1 VERBOSE=1 -C tests opt CC=/usr/bin/gcc 'CFGL=-Wl,--as-needed -Wl,--gc-sections -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -flto=auto -flto-partition=none -fuse-linker-plugin -Wl,--build-id=sha1 -L./lib -llsof -lselinux -ltirpc' 'DEBUG=-O2 -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fdata-sections -ffunction-sections -flto=auto -flto-partition=none -Os -I/usr/include/tirpc'
make: Entering directory '/home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests'
`cat config.cc` -O2 -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fdata-sections -ffunction-sections -flto=auto -flto-partition=none -Os -I/usr/include/tirpc -I. -I.. `cat config.cflags` LTdnlc.c \
LTlib.o `cat config.xobj` -o LTdnlc
LTdnlc.c: In function 'main':
LTdnlc.c:199:16: warning: ignoring return value of 'system' declared with attribute 'warn_unused_result' [-Wunused-result]
  199 |         (void) system(lsbuf);
      |                ^~~~~~~~~~~~~
LTdnlc.c: At top level:
LTdnlc.c:36:13: warning: 'copyright' defined but not used [-Wunused-variable]
   36 | static char copyright[] =
      |             ^~~~~~~~~
make: Leaving directory '/home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests'
make: Entering directory '/home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests'
`cat config.cc` -O2 -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fdata-sections -ffunction-sections -flto=auto -flto-partition=none -Os -I/usr/include/tirpc -I. -I.. `cat config.cflags` LTlock.c \
LTlib.o `cat config.xobj` -o LTlock
LTlock.c:36:13: warning: 'copyright' defined but not used [-Wunused-variable]
   36 | static char copyright[] =
      |             ^~~~~~~~~
make: Leaving directory '/home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests'
make: Entering directory '/home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests'
`cat config.cc` -O2 -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fdata-sections -ffunction-sections -flto=auto -flto-partition=none -Os -I/usr/include/tirpc -I. -I.. `cat config.cflags` LTbigf.c \
LTlib.o `cat config.xobj` -o LTbigf
LTbigf.c:36:13: warning: 'copyright' defined but not used [-Wunused-variable]
   36 | static char copyright[] =
      |             ^~~~~~~~~
make: Leaving directory '/home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests'
make: Entering directory '/home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests'
`cat config.cc` -O2 -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fdata-sections -ffunction-sections -flto=auto -flto-partition=none -Os -I/usr/include/tirpc -I. -I.. `cat config.cflags` LTnfs.c \
LTlib.o `cat config.xobj` -o LTnfs
LTnfs.c:36:13: warning: 'copyright' defined but not used [-Wunused-variable]
   36 | static char copyright[] =
      |             ^~~~~~~~~
make: Leaving directory '/home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests'
make: Entering directory '/home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests'

Optional tests:
LTbigf ... OK
LTdnlc ... /home/tkloczko/rpmbuild/BUILD/lsof-4.96.3/tests found: 100.00%
           OK
LTlock ... lock mismatch: expected W, got " "
           lock mismatch: expected R, got " "
           lock mismatch: expected w, got " "
           lock mismatch: expected r, got " "
LTnfs ... ERROR!!!  test file ./config.LTnfs399810 not found by lsof
          Hint: the temporary path generated by this test might
          not be on an NFS file system, or this test might be
          unable to create a file on the NFS file system.

          As a work-around use the -p option to specify a path to
          a regular file (not a directory) on an NFS file system
          to which this test will have read access.

          See 00FAQ and 00TEST for more information.
Failed tests: 2