CA-77659: Improve character escaping in bash completion
CA-77659: Improve character escaping in bash completion

Replace most uses of compgen() bash built-in with custom
set_completions(), which does not shell expand, and which does
shell quote every completion passed through to the command-line.

salvocambria/xen-api,salvocambria/xen-api,djs55/xen-api,euanh/xen-api,anoobs/xen-api,vasilenkomike/xen-api,salvocambria/xen-api,thomassa/xen-api,huizh/xen-api,robertbreker/xen-api,djs55/xen-api,jjd27/xen-api,guard163/xen-api,jjd27/xen-api,cheng--zhang/xen-api,rafalmiel/xen-api,cheng-z/xen-api,rafalmiel/xen-api,anoobs/xen-api,rafalmiel/xen-api,simonjbeaumont/xen-api,agimofcarmen/xen-api,cheng-z/xen-api,guard163/xen-api,djs55/xen-api,guard163/xen-api,guard163/xen-api,robertbreker/xen-api,cheng-z/xen-api,rafalmiel/xen-api,koushikcgit/xen-api,simonjbeaumont/xen-api,huizh/xen-api,euanh/xen-api,koushikcgit/xen-api,djs55/xen-api,cheng--zhang/xen-api,ravippandey/xen-api,salvocambria/xen-api,koushikcgit/xen-api,Frezzle/xen-api,euanh/xen-api,cheng--zhang/xen-api,vasilenkomike/xen-api,ravippandey/xen-api,jjd27/xen-api,koushikcgit/xen-api,huizh/xen-api,agimofcarmen/xen-api,cheng-z/xen-api,vasilenkomike/xen-api,thomassa/xen-api,huizh/xen-api,agimofcarmen/xen-api,ravippandey/xen-api,salvocambria/xen-api,simonjbeaumont/xen-api,agimofcarmen/xen-api,djs55/xen-api,guard163/xen-api,euanh/xen-api,vasilenkomike/xen-api,anoobs/xen-api,euanh/xen-api,agimofcarmen/xen-api,simonjbeaumont/xen-api,euanh/xen-api,cheng-z/xen-api,koushikcgit/xen-api,cheng--zhang/xen-api,srowe/xen-api,rafalmiel/xen-api,simonjbeaumont/xen-api,cheng--zhang/xen-api,robertbreker/xen-api,anoobs/xen-api,Frezzle/xen-api,jjd27/xen-api,cheng--zhang/xen-api,ravippandey/xen-api,jjd27/xen-api,thomassa/xen-api,rafalmiel/xen-api,srowe/xen-api,anoobs/xen-api,vasilenkomike/xen-api,cheng--zhang/xen-api,thomassa/xen-api,thomassa/xen-api,jjd27/xen-api,guard163/xen-api,vasilenkomike/xen-api,srowe/xen-api,cheng-z/xen-api,thomassa/xen-api,salvocambria/xen-api,srowe/xen-api,agimofcarmen/xen-api,srowe/xen-api,Frezzle/xen-api,robertbreker/xen-api,simonjbeaumont/xen-api,robertbreker/xen-api,huizh/xen-api,anoobs/xen-api,koushikcgit/xen-api,robertbreker/xen-api,ravippandey/xen-api,ravippandey/xen-api,cheng-z/xen-api,djs55/xen-api,Frezzle/xen-api,huizh/xen-api,Frezzle/xen-api