Description of problem:
Running a "rndc-confgen -a" to generate key etc. simply hangs forever, just
a "rndc-confgen -a -r /dev/urandom" is a workaround.

Version-Release number of selected component (if applicable):
bind-9.7.3-2.el6_1.P1.1.x86_64

How reproducible:
Everytime, just install the bind RPM package on a fresh installed RHEL 6.1
and run "rndc-confgen -a".

Actual results:
Running "rndc-confgen -a" simply hangs forever.

Expected results:
Normal working "rndc-confgen -a" like in the past.

Additional info:
[...]
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0x7f9457877000, 4096)            = 0
read(3, 0x7fff624a2580, 16)             = -1 EAGAIN (Resource temporarily unavailable)
select(4, [3], [], NULL, NULL)          = 1 (in [3])
read(3, "NU1\347\24071_", 16)           = 8
read(3, 0x7fff624a2580, 8)              = -1 EAGAIN (Resource temporarily unavailable)
select(4, [3], [], NULL, NULL)          = 1 (in [3])
read(3, "\3{\333I)\253\363R", 8)        = 8
read(3, 0x7fff624a2580, 10)             = -1 EAGAIN (Resource temporarily unavailable)
select(4, [3], [], NULL, NULL^C <unfinished ...>