Bug 1741586

Description of problem:
When changing quorum device parameters and using non-ASCII characters in values, the values are passed into corosync.conf, however pcsd is unable to process them.

Version-Release number of selected component (if applicable):
pcs-0.10.2-3.el8.x86_64

How reproducible:
always

Steps to Reproduce:
1. 
> Try to update qdevice using non-ASCII characters in a parameter's value, e.g. host
[root@virt-005 ~]# pcs quorum device update model host=virtč-004 algorithm=lms
Sending updated corosync.conf to nodes...
virt-005: Succeeded
virt-011: Succeeded
Warning: Error connecting to virt-005 (HTTP error: 500)
Warning: Error connecting to virt-011 (HTTP error: 500)
Error: Unable to perform operation on any available node/host, therefore it is not possible to continue
Error: Errors have occurred, therefore pcs is unable to continue

[root@virt-005 ~]# cat /etc/corosync/corosync.conf
...
quorum {
    provider: corosync_votequorum

    device {
        model: net

        net {
            algorithm: lms
            host: virtč-004
        }
    }
}
...

> This is also applicable to parameters with a predefined set of values to choose from, since the '--force' option can overwrite them
[root@virt-005 ~]# pcs quorum device update model host=virt-004 algorithm=lmsč --force
Warning: 'lmsč' is not a valid algorithm value, use 'ffsplit', 'lms'
Sending updated corosync.conf to nodes...
virt-005: Succeeded
virt-011: Succeeded
Warning: Error connecting to virt-005 (HTTP error: 500)
Warning: Error connecting to virt-011 (HTTP error: 500)
Error: Unable to perform operation on any available node/host, therefore it is not possible to continue
Error: Errors have occurred, therefore pcs is unable to continue

2. 
When trying to update the quorum device with an adjusted value (containing valid characters only), nodes are not able to be authenticated and pcsd does not communicate
[root@virt-005 ~]# pcs quorum device update model host=virt-004 algorithm=lms
Error: Hosts 'virt-005', 'virt-011' are not known to pcs, try to authenticate the hosts using 'pcs host auth virt-005 virt-011' command, use --skip-offline to override
Error: None of hosts is known to pcs.

[root@virt-005 ~]# pcs host auth virt-005 virt-011
Username: hacluster
Password: 
Error: Unable to communicate with pcsd

[root@virt-005 ~]# pcs quorum device update model host=virt-004 algorithm=lms --debug
...
--Debug Stderr Start--
/usr/lib/pcsd/corosyncconf.rb:115:in `split': invalid byte sequence in US-ASCII (ArgumentError)
	from /usr/lib/pcsd/corosyncconf.rb:115:in `parse_string'
	from /usr/lib/pcsd/pcs.rb:663:in `get_cluster_name'
	from /usr/lib/pcsd/pcsd-cli.rb:64:in `<main>'

--Debug Stderr End--
...


Actual results:
pcsd fails to proceed with corosync.conf containing non-ASCII characters. 
The characters then need to be manually removed from corosync.conf on all nodes

Expected results:
pcs should print out an error about non-valid characters or somehow handle them

Additional info: