Make gotsh pass all have-lines sent by clients onwards to gotd, reducing size of pack files generated by the repo_read process. Problem reported by naddy@ ok jamsek

Fixes a race condition on NFS where the file's modify time may change while the file is being edited, causing the editor to complain. OK stsp

The reuse-pack is pinned but may change its cache slot while objects are being deltified. Refresh the pointer to the pinned reuse-pack before writing out the pack file, ensuring that reused deltas will in fact be read from the reuse-pack and not some other pack. Otherwise gotd may send a broken pack file, or hit an ERR_RANGE condition if the pack file which now occupies the pinned-pack's old cache slot is shorter. Which can trigger attempts to read beyond end-of-file which show up in the logs like this: gotd[37311]: repo_read /var/git/got.git: sending packfile: value out of range gotd[43877]: uid 1002: value out of range gotd[43877]: uid 1002: disconnecting

If a file is deleted, then in modified form added again, folding should restore the file with its new contents. ok stsp

"sed -i" is fundamentally unportable. GNU and OpenBSD sed(1) treat the extension for the backup file as an optional argument and use "sed -i" for no backup file. FreeBSD sed(1) treats the extension as an obligatory argument and uses "sed -i ''" for no backup file. There is no single syntax that works for both. ok stsp op

no need for sed (which doesn't change anything anyway), a no-op editor script is enough; the test ensures that the prepared log message is used. ok naddy@ stsp@

ok stsp

Patch from Josiah Frentsos, thanks!

Patch by Josiah Frentsos, thanks!

`-o' was missing. Patch from Josiah Frentsos, thank you!