The changes that you made to this default plugin are so trivial that it doesn't really merit posting it as a plugin submission.
Also, the fact that it's so trivial, it's a bit insulting that you changed the author of the plugin to some random name. I generally add my name after the original to denote that I'm a secondary author and/or add a signifier to the version (e.g. "f1", "f2", ..., etc.). And, this is even if I've made more than just trivial changes.
This whole thing can basically be accomplished with a separate plugin using client_cmd() or amxclient_cmd() without needing to replace the original adminhelp plugin. Another benefit to this approach is that it's basically forwards compatible! In fact, I suspect that there is a generic aliasing plugin already out there that can do this already.
Code:
#include <amxmodx>
public plugin_init()
{
register_concmd("myAlias", "cmdAlias")
}
public cmdAlias(id)
{
new szString[64]
read_argv(0, szString, charsmax(szString))
client_cmd(id, "amx_searchcmd %s", szString)
}
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