Output more data when a svc_sendreply fails.

Ported from 1.5.x:
b3eadcf0206425280b8d458a69fe1b26e425714d

Signed-off-by: Jeremy Bongio <jbongio@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Fix memory leak in debug_info functions.

    Port from 1.5.x:
    ec34463001b97158c088427eee9d0eb0cc9bcffa

Signed-off-by: Jeremy Bongio <jbongio@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Fix some error codes so they aren't ignored/retried.

Ported from 1.5.x:
49506e6f3fe94204ed85827b91af98960483a8f5

Signed-off-by: Jeremy Bongio <jbongio@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Stop overwriting cache_inode_commit status accidentally.

Ported from 1.5.x:
e251f09fb19ae273afc2dff858d4948fb9dce7b0

Signed-off-by: Jeremy Bongio <jbongio@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Updated Docs/15to20-porting.txt

Signed-off-by: Frank Filz <ffilz@us.ibm.com>
Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>