Revert "umb: Update man page HISTORY"

Oops, pushed in error from a staging branch.

This reverts commit ed79730624.

sbin/umbctl/umbctl.8

@@ -155,7 +155,7 @@ The
 utility first appeared in
 .Nx 9.0 ,
 and
-.Fx 14.4 .
+.Fx 15.0 .
 .Sh AUTHORS
 The program was written by
 .An Pierre Pronchery .

share/man/man4/umb.4

@@ -97,7 +97,7 @@ device driver first appeared in
 .Ox 6.0 ,
 .Nx 9.0 ,
 and
-.Fx 14.4 .
+.Fx 15.0 .
 .Sh AUTHORS
 .An -nosplit
 The