sh_init(): rm directoryless '.profile' login file path

This applies a patch from Solaris:
https://github.com/oracle/solaris-userland/blob/master/components/ksh93/patches/160-CR7175995.patch

There is no public information on why it's needed, but it seems
sensible on the face of it. Using a file called '.profile' in the
PWD on login, without a directory path, is redundant at best, since
"$HOME/.profile" (e_profile, see data/msg.c) is already used. And
if the PWD is not $HOME at login time, it seems to me there are
serious problems and the last thing you want is to read some
random and probably dodgy '.profile' from the PWD.

src/cmd/ksh93/sh/init.c: sh_init(): login_files[]:
- Remove redundant/problematic ".profile" entry.

src/cmd/ksh93/sh/init.c

@@ -1178,7 +1178,7 @@ Shell_t *sh_init(register int argc,register char *argv[], Shinit_f userinit)
 	register int n;
 	int type;
 	char *save_envmarker;
-	static char *login_files[3];
+	static char *login_files[2];
 	memfatal();
 	n = strlen(e_version);
 	if(e_version[n-1]=='$' && e_version[n-2]==' ')
@@ -1450,7 +1450,6 @@ Shell_t *sh_init(register int argc,register char *argv[], Shinit_f userinit)
         shp->topscope = (Shscope_t*)shp->st.self;
 	sh_offstate(SH_INIT);
 	login_files[0] = (char*)e_profile;
-	login_files[1] = ".profile";
 	shp->gd->login_files = login_files;
 	shp->bltindata.version = SH_VERSION;
 	shp->bltindata.shp = shp;