Bug 505941

Description of problem:
cups webui doesn't work, cupsd hangs eating 100 % cpu

Version-Release number of selected component (if applicable):
$ rpm -qa | grep cups
cups-1.4-0.b2.18.fc11.x86_64
bluez-cups-4.37-2.fc11.x86_64
gutenprint-cups-5.2.3-5.fc11.x86_64
cups-libs-1.4-0.b2.18.fc11.x86_64
hal-cups-utils-0.6.19-2.fc11.x86_64
cups-debuginfo-1.4-0.b2.18.fc11.x86_64


How reproducible:
always

Steps to Reproduce:
1. open https://localhost:631/
2. click administration
3. click add printer
4. enter root with password (or just don't enter any password - hit cancel)
  
Actual results:
cups webui not responding, cupsd hanged taking 100% cpu

Expected results:
working cups webui

Additional info:
(gdb) bt full
#0  0x00007f5cd30037a3 in __epoll_wait_nocancel () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f5cd60ca41c in cupsdDoSelect (timeout=1) at select.c:481
        i = <value optimized out>
        event = <value optimized out>
        nfds = <value optimized out>
        fdptr = <value optimized out>
        pfd = <value optimized out>
        count = <value optimized out>
#2  0x00007f5cd60a3e8c in main (argc=<value optimized out>, argv=<value optimized out>) at main.c:836
        i = 1514
        opt = <value optimized out>
        fg = <value optimized out>
        fds = 2
        con = <value optimized out>
        job = 0x0
        lis = <value optimized out>
        current_time = <value optimized out>
        browse_time = 1245009466
        senddoc_time = 1245009465
        expire_time = 1245009466
        report_time = 0
        event_time = 1245008314
        timeout = 1
        current_time = <value optimized out>
        browse_time = 1245009466
        senddoc_time = 1245009465
        expire_time = 1245009466
        report_time = 0
        event_time = 1245008314
        timeout = 1
        limit = {rlim_cur = 1024, rlim_max = 1024}
        action = {__sigaction_handler = {sa_handler = 0x7f5cd60a3360 <sigterm_handler>, sa_sigaction = 0x7f5cd60a3360 <sigterm_handler>},
          sa_mask = {__val = {81920, 0 <repeats 15 times>}}, sa_flags = 0, sa_restorer = 0}
        netif_time = 1245009465
        failmode = FAIL_IGNORE

-----------------------------------------

(gdb) bt
#0  0x00007f5cd30037a3 in __epoll_wait_nocancel () from /lib64/libc.so.6
#1  0x00007f5cd60ca41c in cupsdDoSelect (timeout=1) at select.c:481
#2  0x00007f5cd60a3e8c in main (argc=<value optimized out>, argv=<value optimized out>) at main.c:836