Make /delhome, /home, /delwarp and /warp ignore name case

[rootatdebian]

This commit does not break compatibility with pre-existing config files. The commands /homes and /warps will show the home/warp names with the same casing used when setting them with /sethome and /setwarp. Setting a warp or home when one with different casing already exists will cause it to be overwritten. The code is a little hacky, but it does the job.

[hsyyid]

Looks good, will just test it in a minute then merge.