Update rc.initdiskless, fix error handling of remount_optional #1497
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chkerr() ignores the exit code of a preceding mount command in case a file ```remount_optional``` exists. The check is performed and a subshell is launched to log the informational message and return. The return is executed in the context of the subshell, not the context of the chkerr() function, hence is a NOP. The remount_optional check is hence ineffective. Change the code to if/then/fi, so the return is evaluated in the context of the chkerr function, to make the check effective.
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chkerr() ignores the exit code of a preceding mount command in case a file
remount_optionalexists. The check is performed and a subshell is launched to log the informational message and return. The return is executed in the context of the subshell, not the context of the chkerr() function, hence is a NOP. The remount_optional check is hence ineffective.Change the code to if/then/fi, so the return is evaluated in the context of the chkerr function, to make the check effective.