Fix some issues reported by lintian

Fix some issues reported by lintian

• Set upstream metadata fields: Bug-Database, Bug-Submit, Repository-Browse. (upstream-metadata-file-is-missing, upstream-metadata-missing-bug-tracking)
• Update standards version to 4.6.1, no changes needed. (out-of-date-standards-version)
• Set upstream metadata fields: Repository. (upstream-metadata-missing-repository)
• Add debian/watch file, using github. (debian-watch-file-is-missing)
• Update standards version to 4.6.2, no changes needed. (out-of-date-standards-version)

Debdiff

These changes affect the binary packages:

[The following lists of changes regard files as different if they have different names, permissions or owners.]

Files in second set of .debs but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/4e/53a2aa9ae3db5c35f0710b467cfb0e84217e87.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/92/a6ead8c08e184777216b29d28cfc3532a161e6.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/99/fc31221cb350ee6d261e5ec112a921e94b8835.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/d2/562f9adb52a47758f4c8f72f13744dee079029.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/7a/f24a917d3393e3e92c2c9604b31ce658341b2d.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/a0/0616880724f51b4b81f9d03dbcd9a2224b06c1.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/ba/918379b21716f5dd132b148bd6386d541f502d.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/f6/406cc99e7ba2a58e62d014a0e7460fc22e8338.debug

Control files of package fstrm-bin: lines which differ (wdiff format)

• Depends: libc6 (>= 2.7), 2.34), libevent-2.1-7 (>= 2.1.8-stable), libfstrm0 (>= 0.4.0)

Control files of package fstrm-bin-dbgsym: lines which differ (wdiff format)

• Build-Ids: 7af24a917d3393e3e92c2c9604b31ce658341b2d a00616880724f51b4b81f9d03dbcd9a2224b06c1 f6406cc99e7ba2a58e62d014a0e7460fc22e8338 4e53a2aa9ae3db5c35f0710b467cfb0e84217e87 99fc31221cb350ee6d261e5ec112a921e94b8835 d2562f9adb52a47758f4c8f72f13744dee079029

No differences were encountered between the control files of package **libfstrm-dev**

Control files of package libfstrm0: lines which differ (wdiff format)

• Depends: libc6 (>= 2.32) 2.34)

Control files of package libfstrm0-dbgsym: lines which differ (wdiff format)

• Build-Ids: ba918379b21716f5dd132b148bd6386d541f502d 92a6ead8c08e184777216b29d28cfc3532a161e6

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Build and test logs for this branch can be found at https://janitor.debian.net/run/76dba5ad-96c8-4430-b8ef-5389d990f3e2.