Description of problem:
module-init-tools should buildrequire docbook-utils, otherwise:

--- snipp ---
[...]
gcc  -O2 -Wall -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -m32 -march=i386 -mtune=pentium4 -DCONFIG_NO_BACKWARDS_COMPAT=1 -Wunused -Wall   -o insmod.static -static insmod.o
if [ "docbook2man" = "docbook2man" ]; then                     \
    docbook2man doc/modprobe.conf.sgml > /dev/null 2>&1;                       \
else                                                               \
    docbook2man doc/modprobe.conf.sgml 2>&1 > modprobe.conf.5 | sed 's/^[^:]*://';              \
fi
make: *** [modprobe.conf.5] Error 127
Fehler: Bad exit status from /var/tmp/rpm-tmp.78770 (%build)
--- snapp ---

Version-Release number of selected component (if applicable):
module-init-tools-3.1-1

How reproducible:
Everytime, see below.

Steps to Reproduce:
1. Uninstall docbook-utils
2. Try to rebuild docbook-utils
3. Get the error written above
  
Actual results:
No buildrequirement to docbook-utils

Expected results:
"BuildRequires: docbook-utils" in module-init-tools.spec