Disable urfave markdown/man docs generation

From urfave/cli#1383 :
> This removes the resulting binary dependency on cpuguy83/md2man and
> russross/blackfriday (and a few more packages imported by those),
> which saves more than 400 KB (more than 300 KB
> once stripped) from the resulting binary.

Signed-off-by: Brad Davidson <brad.davidson@rancher.com>

go.mod

@@ -108,7 +108,7 @@ require (
 	github.com/sirupsen/logrus v1.8.1
 	github.com/stretchr/testify v1.7.0
 	github.com/tchap/go-patricia v2.3.0+incompatible // indirect
-	github.com/urfave/cli v1.22.4
+	github.com/urfave/cli v1.22.9
 	github.com/vishvananda/netlink v1.1.1-0.20210330154013-f5de75959ad5
 	github.com/yl2chen/cidranger v1.0.2
 	go.etcd.io/etcd/api/v3 v3.5.4

go.sum

@@ -1235,8 +1235,9 @@ github.com/ulikunitz/xz v0.5.8/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oW
 github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
 github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/urfave/cli v1.22.2/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
-github.com/urfave/cli v1.22.4 h1:u7tSpNPPswAFymm8IehJhy4uJMlUuU/GmqSkvJ1InXA=
 github.com/urfave/cli v1.22.4/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
+github.com/urfave/cli v1.22.9 h1:cv3/KhXGBGjEXLC4bH0sLuJ9BewaAbpk5oyMOveu4pw=
+github.com/urfave/cli v1.22.9/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/urfave/cli/v2 v2.3.0/go.mod h1:LJmUH05zAU44vOAcrfzZQKsZbVcdbOG8rtL3/XcUArI=
 github.com/urfave/cli/v2 v2.5.1 h1:YKwdkyA0xTBzOaP2G0DVxBnCheHGP+Y9VbKAs4K1Ess=
 github.com/urfave/cli/v2 v2.5.1/go.mod h1:oDzoM7pVwz6wHn5ogWgFUU1s4VJayeQS+aEZDqXIEJs=

scripts/build

@@ -48,7 +48,7 @@ LDFLAGS="
 STATIC="
     -extldflags '-static -lm -ldl -lz -lpthread'
 "
-TAGS="apparmor seccomp netcgo osusergo providerless"
+TAGS="apparmor seccomp netcgo osusergo providerless urfave_cli_no_docs"
 RUNC_TAGS="apparmor seccomp"
 RUNC_STATIC="static"